Condensed cyclic compound and organic light-emitting device including the same

ABSTRACT

A condensed cyclic compound and an organic light-emitting device, the condensed cyclic compound being represented by Formula 1 below:

CROSS-REFERENCE TO RELATED APPLICATION

Korean Patent Application No. 10-2014-0119380, filed on Sep. 5, 2014, inthe Korean Intellectual Property Office, and entitled: “Condensed CyclicCompound and Organic Light-Emitting Device Including the Same,” isincorporated by reference herein in its entirety.

BACKGROUND

1. Field

Embodiments relate to a condensed cyclic compound and an organiclight-emitting device including the same.

2. Description of the Related Art

Organic light emitting devices are self-emission devices that may havewide viewing angles, high contrast ratios, short response times, andexcellent brightness, driving voltage, and response speedcharacteristics, and produce full-color images.

The organic light-emitting device may include a first electrode disposedon a substrate, and a hole transport region, an emission layer, anelectron transport region, and a second electrode, which aresequentially disposed on the first electrode. Holes provided from thefirst electrode may move toward the emission layer through the holetransport region, and electrons provided from the second electrode maymove toward the emission layer through the electron transport region.Carriers, such as holes and electrons, may be recombined in the emissionlayer to produce excitons. These excitons may change from an excitedstate to a ground state, thereby generating light.

SUMMARY

The embodiments may provide a condensed cyclic compound and an organiclight-emitting device including the same.

Additional aspects will be set forth in part in the description whichfollows and, in part, will be apparent from the description, or may belearned by practice of the presented embodiments.

An aspect of embodiments provides a condensed cyclic compoundrepresented by Formula 1 below:

wherein in the Formula 1 above,

L₁ is selected from a substituted or unsubstituted C₃-C₁₀ cycloalkylenegroup, a substituted or unsubstituted C₁-C₁₀ heterocycloalkylene group,a substituted or unsubstituted C₃-C₁₀ cycloalkenylene group, asubstituted or unsubstituted C₁-C₁₀ heterocycloalkenylene group, asubstituted or unsubstituted C₆-C₆₀ arylene group, a substituted orunsubstituted C₁-C₆₀ heteroarylene group, a substituted or unsubstituteddivalent non-aromatic condensed polycyclic group, and a substituted orunsubstituted divalent non-aromatic condensed heteropolycyclic group;

a1 is selected from 0, 1, 2, and 3, and when a1 is two or more, aplurality of L₁ are identical or different;

A₁ is selected from a deuterium, —F, —Cl, —Br, —I, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a sulfonic acid or a salt thereof, a phosphoric acid ora salt thereof, —P(═O)(R₂₁)(R₂₂), —P(═S)(R₂₃)(R₂₄), —S(═O)(R₂₅)(R₂₆),—S(═O)₂(R₂₇), a substituted or unsubstituted C₁-C₆₀ alkyl group, asubstituted or unsubstituted C₂-C₆₀ alkenyl group, a substituted orunsubstituted C₂-C₆₀ alkynyl group, a substituted or unsubstitutedC₁-C₆₀ alkoxy group, a substituted or unsubstituted C₃-C₁₀ cycloalkylgroup, a substituted or unsubstituted C₁-C₁₀ heterocycloalkyl group, asubstituted or unsubstituted C₃-C₁₀ cycloalkenyl group, a substituted orunsubstituted C₁-C₁₀ heterocycloalkenyl group, a substituted orunsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₆-C₆₀aryloxy group, a substituted or unsubstituted C₆-C₆₀ arylthiogroup, asubstituted or unsubstituted C₁-C₆₀ heteroaryl group, a substituted orunsubstituted monovalent non-aromatic condensed polycyclic group, asubstituted or unsubstituted monovalent non-aromatic condensedheteropolycyclic group, —Si(Q₁)(Q₂)(Q₃), —B(Q₄)(Q₅), and —N(Q₆)(Q₇);

b1 is an integer selected from 1, 2, 3, and 4, and when b1 is 2 or more,a plurality of A₁ are identical or different.

R₁ to R₁₁ are each independently selected from a hydrogen, a deuterium,—F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, anamino group, an amidino group, a hydrazine group, a hydrazone group, acarboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, aphosphoric acid or a salt thereof, —P(═O)(R₃₁)(R₃₂), —P(═S)(R₃₃)(R₃₄),—S(═O)(R₃₅)(R₃₆), —S(═O)₂(R₃₇), a substituted or unsubstituted C₁-C₆₀alkyl group, a substituted or unsubstituted C₂-C₆₀ alkenyl group, asubstituted or unsubstituted C₂-C₆₀ alkynyl group, a substituted orunsubstituted C₁-C₆₀ alkoxy group, a substituted or unsubstituted C₃-C₁₀cycloalkyl group, a substituted or unsubstituted C₁-C₁₀ heterocycloalkylgroup, a substituted or unsubstituted C₃-C₁₀ cycloalkenyl group, asubstituted or unsubstituted C₁-C₁₀ heterocycloalkenyl group, asubstituted or unsubstituted C₆-C₆₀ aryl group, a substituted orunsubstituted C₆-C₆₀ aryloxy group, a substituted or unsubstitutedC₆-C₆₀ arylthiogroup, a substituted or unsubstituted C₁-C₆₀ heteroarylgroup, a substituted or unsubstituted monovalent non-aromatic condensedpolycyclic group, a substituted or unsubstituted monovalent non-aromaticcondensed heteropolycyclic group, —Si(Q₁₁)(Q₁₂)(Q₁₃), —B(Q₁₄)(Q₁₅), and—N(Q₁₆)(Q₁₇);

R₂₁ to R₂₇ and R₃₁ to R₃₇ are each independently selected from ahydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a substituted or unsubstituted C₁-C₆₀ alkylgroup, a substituted or unsubstituted C₂-C₆₀ alkenyl group, asubstituted or unsubstituted C₂-C₆₀ alkynyl group, a substituted orunsubstituted C₁-C₆₀ alkoxy group, a substituted or unsubstituted C₃-C₁₀cycloalkyl group, a substituted or unsubstituted C₁-C₁₀ heterocycloalkylgroup, a substituted or unsubstituted C₃-C₁₀ cycloalkenyl group, asubstituted or unsubstituted C₁-C₁₀ heterocycloalkenyl group, asubstituted or unsubstituted C₆-C₆₀ aryl group, a substituted orunsubstituted C₁-C₆₀ heteroaryl group, a substituted or unsubstitutedmonovalent non-aromatic condensed polycyclic group, and a substituted orunsubstituted monovalent non-aromatic condensed heteropolycyclic group;

at least one substituent of the substituted C₃-C₁₀ cycloalkylene group,substituted C₁-C₁₀ heterocycloalkylene group, substituted C₃-C₁₀cycloalkenylene group, substituted C₁-C₁₀ heterocycloalkenylene group,substituted C₆-C₆₀ arylene group, substituted C₁-C₆₀ heteroarylenegroup, substituted divalent non-aromatic condensed polycyclic group,substituted divalent non-aromatic condensed heteropolycyclic group,substituted C₁-C₆₀ alkyl group, substituted C₂-C₆₀ alkenyl group,substituted C₂-C₆₀ alkynyl group, substituted C₁-C₆₀ alkoxy group,substituted C₃-C₁₀ cycloalkyl group, substituted C₁-C₁₀ heterocycloalkylgroup, substituted C₃-C₁₀ cycloalkenyl group, substituted C₁-C₁₀heterocycloalkenyl group, substituted C₆-C₆₀ aryl group, substitutedC₆-C₆₀ aryloxy group, substituted C₆-C₆₀ arylthio group, substitutedC₁-C₆₀ heteroaryl group, substituted monovalent non-aromatic condensedpolycyclic group, and substituted monovalent non-aromatic condensedheteropolycyclic group may be selected from

a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid or a salt thereof, a sulfonic acid or a saltthereof, a phosphoric acid or a salt thereof, a C₁-C₆₀ alkyl group, aC₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and a C₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid group or a salt thereof, a sulfonicacid group or a salt thereof, a phosphoric acid group or a salt thereof,a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid group or a salt thereof, aphosphoric acid group or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, amonovalent non-aromatic condensed polycyclic group, a monovalentnon-aromatic condensed heteropolycyclic group, —Si(Q₂₁)(Q₂₂)(Q₂₃),—B(Q₂₄)(Q₂₅), and —N(Q₂₆)(Q₂₇); and

—Si(Q₃₁)(Q₃₂)(Q₃₃), —B(Q₃₄)(Q₃₅), and —N(Q₃₆)(Q₃₇);

wherein Q₁ to Q₇, Q₁₁ to Q₁₇, Q₂₁ to Q₂₇, and Q₃₁ to Q₃₇ may be eachindependently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, ahydroxyl group, a cyano group, a nitro group, an amino group, an amidinogroup, a hydrazine group, a hydrazone group, a carboxylic acid or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynylgroup, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₁-C₆₀ heteroarylgroup, a monovalent non-aromatic condensed polycyclic group, and amonovalent non-aromatic condensed heteropolycyclic group.

Another aspect of embodiments provides an organic light-emitting deviceincludes: a first electrode; a second electrode facing the firstelectrode; and an organic layer that is disposed between the firstelectrode and the second electrode and includes an emission layer,wherein the organic layer includes at least one of the condensed cycliccompound described above.

BRIEF DESCRIPTION OF THE DRAWING

Features will be apparent to those of skill in the art by describing indetail exemplary embodiments with reference to the attached drawing inwhich:

FIG. 1 illustrates a schematic view of an organic light-emitting deviceaccording to an embodiment.

DETAILED DESCRIPTION

Example embodiments will now be described more fully hereinafter withreference to the accompanying drawing; however, they may be embodied indifferent forms and should not be construed as limited to theembodiments set forth herein. Rather, these embodiments are provided sothat this disclosure will be thorough and complete, and will fullyconvey exemplary implementations to those skilled in the art.

In the drawing FIGURE, the dimensions of layers and regions may beexaggerated for clarity of illustration. Like reference numerals referto like elements throughout.

As used herein, the term “and/or” includes any and all combinations ofone or more of the associated listed items. Expressions such as “atleast one of,” when preceding a list of elements, modify the entire listof elements and do not modify the individual elements of the list.

A condensed cyclic compound according to an embodiment may berepresented by Formula 1 below.

L₁ in Formula 1 may be selected from or include, e.g., a substituted orunsubstituted C₃-C₁₀ cycloalkylene group, a substituted or unsubstitutedC₁-C₁₀ heterocycloalkylene group, a substituted or unsubstituted C₃-C₁₀cycloalkenylene group, a substituted or unsubstituted C₁-C₁₀heterocycloalkenylene group, a substituted or unsubstituted C₆-C₆₀arylene group, a substituted or unsubstituted C₁-C₆₀ heteroarylenegroup, a substituted or unsubstituted divalent non-aromatic condensedpolycyclic group, and/or a substituted or unsubstituted divalentnon-aromatic condensed heteropolycyclic group.

In an implementation, L₁ in Formula 1 may be selected from:

a phenylene group, a pentalenylene group, an indenylene group, anaphthylene group, an azulenylene group, a heptalenylene group, anindacenylene group, an acenaphthylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorenylene group, adibenzofluorenylene group, a phenalenylene group, a phenanthrenylenegroup, an anthracenylene group, a fluoranthenylene group, atriphenylenylene group, a pyrenylene group, a chrysenylene group, anaphthacenylene group, a picenylene group, a perylenylene group, apentaphenylene group, a hexacenylene group, a pentacenylene group, arubicenylene group, a coronenylene group, an ovalenylene group, apyrrolylene group, a thiophenylene group, a furanylene group, animidazolylene group, a pyrazolylene group, a thiazolylene group, anisothiazolylene group, an oxazolylene group, a isoxazolylene group, apyridinylene group, a pyrazinylene group, a pyrimidinylene group, apyridazinylene group, an isoindolylene group, an indolylene group, anindazolylene group, a purinylene group, a quinolinylene group, anisoquinolinylene group, a benzoquinolinylene group, a phthalazinylenegroup, a naphthyridinylene group, a quinoxalinylene group, aquinazolinylene group, a cinnolinylene group, a carbazolylene group, aphenanthridinylene group, an acridinylene group, a phenanthrolinylenegroup, a phenazinylene group, a benzoimidazolylene group, abenzofuranylene group, a benzothiophenylene group, anisobenzothiazolylene group, a benzoxazolylene group, anisobenzoxazolylene group, a triazolylene group, a tetrazolylene group,an oxadiazolylene group, a triazinylene group, a dibenzofuranylenegroup, a dibenzothiophenylene group, a benzocarbazolylene group, adibenzocarbazolylene group, a thiadiazolylene group, animidazopyridinylene group, and an imidazopyrimidinylene group; and

a phenylene group, a pentalenylene group, an indenylene group, anaphthylene group, an azulenylene group, a heptalenylene group, anindacenylene group, an acenaphthylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorenylene group, adibenzofluorenylene group, a phenalenylene group, a phenanthrenylenegroup, an anthracenylene group, a fluoranthenylene group, atriphenylenylene group, a pyrenylene group, a chrysenylene group, anaphthacenylene group, a picenylene group, a perylenylene group, apentaphenylene group, a hexacenylene group, a pentacenylene group, arubicenylene group, a coronenylene group, an ovalenylene group, apyrrolylene group, a thiophenylene group, a furanylene group, animidazolylene group, a pyrazolylene group, a thiazolylene group, anisothiazolylene group, an oxazolylene group, a isoxazolylene group, apyridinylene group, a pyrazinylene group, a pyrimidinylene group, apyridazinylene group, an isoindolylene group, an indolylene group, anindazolylene group, a purinylene group, a quinolinylene group, anisoquinolinylene group, a benzoquinolinylene group, a phthalazinylenegroup, a naphthyridinylene group, a quinoxalinylene group, aquinazolinylene group, a cinnolinylene group, a carbazolylene group, aphenanthridinylene group, an acridinylene group, a phenanthrolinylenegroup, a phenazinylene group, a benzoimidazolylene group, abenzofuranylene group, a benzothiophenylene group, anisobenzothiazolylene group, a benzoxazolylene group, anisobenzoxazolylene group, a triazolylene group, a tetrazolylene group,an oxadiazolylene group, a triazinylene group, a dibenzofuranylenegroup, a dibenzothiophenylene group, a benzocarbazolylene group, adibenzocarbazolylene group, a thiadiazolylene group, animidazopyridinylene group, and an imidazopyrimidinylene group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, acyclopentyl group, a cyclohexyl group, a cycloheptyl group, acyclopentenyl group, a cyclohexenyl group, a phenyl group, a pentalenylgroup, an indenyl group, a naphthyl group, an azulenyl group, aheptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenylgroup, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, ananthracenyl group, a fluoranthenyl group, a triphenylenyl group, apyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group,a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenylgroup, a rubicenyl group, a coronenyl group, an ovalenyl group, apyrrolyl group, a thiophenyl group, a furanyl group, an imidazolylgroup, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, anoxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinylgroup, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, anindolyl group, an indazolyl group, a purinyl group, a quinolinyl group,an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, anaphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, acinnolinyl group, a carbazolyl group, a phenanthridinyl group, anacridinyl group, a phenanthrolinyl group, a phenazinyl group, abenzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, anisobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group,a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinylgroup, a dibenzofuranyl group, a dibenzothiophenyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, a thiadiazolyl group,an imidazopyridinyl group, and an imidazopyrimidinyl group.

In an implementation, L₁ in Formula 1 may be a group represented by oneof Formulae 3-1 to 3-32 below.

In Formulae 3-1 to 3-32,

Y₁ may be O, S, C(Z₃)(Z₄), N(Z₅), or Si(Z₆)(Z₇);

Z₁ to Z₇ may each independently be selected from or include a hydrogen,a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid or a salt thereof, a sulfonic acid or a saltthereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, aC₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenylgroup, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, apyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group,a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, anisoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, acarbazolyl group, and/or a triazinyl group;

d1 may be an integer selected from 1, 2, 3, and 4, d2 may be an integerselected from 1, 2, and 3, d3 may be an integer selected from 1, 2, 3,4, 5, and 6, d4 may be an integer selected from 1, 2, 3, 4, 5, 6, 7, and8, d5 may be 1 or 2, and d6 may be an integer selected from 1, 2, 3, 4,and 5, and * and *′ indicate or represent binding sites to a neighboringatom.

In an implementation, L₁ in Formula 1 may be a group represented by oneof Formulae 4-1 to 4-32 below.

* and *′ in Formulae 4-1 to 4-32 indicate or represent a binding site toa neighboring atom, and CN is a cyano group.

a1 in Formula 1 indicates the number of L₁ and may be an integerselected from 0, 1, 2 and 3. In an implementation, a1 may be, e.g., 0or 1. When a1 is 0, *-(L₁)_(a1)-*′ may be a single bond. When a1 is 2 ormore, a plurality of L₁ may be identical or different.

In an implementation, a1 in Formula 1 may be 0, 1, or 2.

A₁ in Formula 1 may be selected from or include, e.g., a deuterium, —F,—Cl, —Br, —I, a cyano group, a nitro group, an amino group, an amidinogroup, a hydrazine group, a hydrazone group, a sulfonic acid or a saltthereof, a phosphoric acid or a salt thereof, —P(═O)(R₂₁)(R₂₂),—P(═S)(R₂₃)(R₂₄), —S(═O)(R₂₅)(R₂₆), —S(═O)₂(R₂₇), a substituted orunsubstituted C₁-C₆₀ alkyl group, a substituted or unsubstituted C₂-C₆₀alkenyl group, a substituted or unsubstituted C₂-C₆₀ alkynyl group, asubstituted or unsubstituted C₁-C₆₀ alkoxy group, a substituted orunsubstituted C₃-C₁₀ cycloalkyl group, a substituted or unsubstitutedC-C₁₀ heterocycloalkyl group, a substituted or unsubstituted C₃-C₁₀cycloalkenyl group, a substituted or unsubstituted C-C₁₀heterocycloalkenyl group, a substituted or unsubstituted C₆-C₆₀ arylgroup, a substituted or unsubstituted C₆-C₆₀ aryloxy group, asubstituted or unsubstituted C₆-C₆₀ arylthiogroup, a substituted orunsubstituted C-C₆₀ heteroaryl group, a substituted or unsubstitutedmonovalent non-aromatic condensed polycyclic group, a substituted orunsubstituted monovalent non-aromatic condensed heteropolycyclic group,—Si(Q₁)(Q₂)(Q₃), —B(Q₄)(Q₅), and/or —N(Q₆)(Q₇).

In an implementation, A₁ in Formula 1 may be selected from:

a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, an aminogroup, an amidino group, a hydrazine group, a hydrazone group, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,—P(═O)(R₂₁)(R₂₂), —P(═S)(R₂₃)(R₂₄), —S(═O)(R₂₅)(R₂₆), and —S(═O)₂(R₂₇);

a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group,an azulenyl group, a heptalenyl group, an indacenyl group, anacenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, abenzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, aphenanthrenyl group, an anthracenyl group, a fluoranthenyl group, atriphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenylgroup, a picenyl group, a perylenyl group, a pentaphenyl group, ahexacenyl group, a pentacenyl group, a rubicenyl group, a coronenylgroup, an ovalenyl group, a pyrrolyl group, a thiophenyl group, afuranyl group, an imidazolyl group, a pyrazolyl group, a thiazolylgroup, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, an isoindolyl group, an indolyl group, an indazolyl group, apurinyl group, a quinolinyl group, an isoquinolinyl group, abenzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, aquinoxalinyl group, a quinazolinyl group, a cinnolinyl group, acarbazolyl group, a phenanthridinyl group, an acridinyl group, aphenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, abenzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group,a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, atetrazolyl group, an oxadiazolyl group, a triazinyl group, adibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolylgroup, a dibenzocarbazolyl group, a thiadiazolyl group, animidazopyridinyl group, an imidazopyrimidinyl group, and abenzophenanthridinyl group;

a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group,an azulenyl group, a heptalenyl group, an indacenyl group, anacenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, abenzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, aphenanthrenyl group, an anthracenyl group, a fluoranthenyl group, atriphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenylgroup, a picenyl group, a perylenyl group, a pentaphenyl group, ahexacenyl group, a pentacenyl group, a rubicenyl group, a coronenylgroup, an ovalenyl group, a pyrrolyl group, a thiophenyl group, afuranyl group, an imidazolyl group, a pyrazolyl group, a thiazolylgroup, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, an isoindolyl group, an indolyl group, an indazolyl group, apurinyl group, a quinolinyl group, an isoquinolinyl group, abenzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, aquinoxalinyl group, a quinazolinyl group, a cinnolinyl group, acarbazolyl group, a phenanthridinyl group, an acridinyl group, aphenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, abenzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group,a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, atetrazolyl group, an oxadiazolyl group, a triazinyl group, adibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolylgroup, a dibenzocarbazolyl group, a thiadiazolyl group, animidazopyridinyl group, an imidazopyrimidinyl group, and abenzophenanthridinyl group, each substituted with at least one selectedfrom a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid ora salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkylgroup, a C₁-C₂₀ alkoxy group, a cyclopentyl group, a cyclohexyl group, acycloheptyl group, a cyclopentenyl group, a cyclohexenyl group, a phenylgroup, a pentalenyl group, an indenyl group, a naphthyl group, anazulenyl group, a heptalenyl group, an indacenyl group, an acenaphthylgroup, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenylgroup, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenylgroup, an anthracenyl group, a fluoranthenyl group, a triphenylenylgroup, a pyrenyl group, a chrysenyl group, a naphthacenyl group, apicenyl group, a perylenyl group, a pentaphenyl group, a hexacenylgroup, a pentacenyl group, a rubicenyl group, a coronenyl group, anovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group,an imidazolyl group, a pyrazolyl group, a thiazolyl group, anisothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinylgroup, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, anisoindolyl group, an indolyl group, an indazolyl group, a purinyl group,a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, aphthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, aquinazolinyl group, a cinnolinyl group, a carbazolyl group, aphenanthridinyl group, an acridinyl group, a phenanthrolinyl group, aphenazinyl group, a benzoimidazolyl group, a benzofuranyl group, abenzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group,an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, anoxadiazolyl group, a triazinyl group, a dibenzofuranyl group, adibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolylgroup, a thiadiazolyl group, an imidazopyridinyl group, animidazopyrimidinyl group, and —Si(Q₃₁)(Q₃₂)(Q₃₃); and

—Si(Q₁)(Q₂)(Q₃),

Q₁ to Q₃ and Q₃₁ to Q₃₃ may each independently be selected from orinclude, e.g., a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxylgroup, a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenylgroup, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenylgroup, a pyrenyl group, a chrysenyl group, a pyridinyl group, apyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinylgroup, an isoquinolinyl group, a quinoxalinyl group, a quinazolinylgroup, a carbazolyl group, and/or a triazinyl group.

In an implementation, A₁ in Formula 1 may be selected from:

a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, an aminogroup, an amidino group, a hydrazine group, a hydrazone group, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,—P(═O)(R₂₁)(R₂₂), —P(═S)(R₂₃)(R₂₄), —S(═O)(R₂₅)(R₂₆), and —S(═O)₂(R₂₇);

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, a triazinyl group, adibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolylgroup, a dibenzocarbazolyl group, and a benzophenanthridinyl group;

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, a triazinyl group adibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolylgroup, a dibenzocarbazolyl group, and a benzophenanthridinyl group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenylgroup, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, abenzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group,an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinylgroup, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, aquinolinyl group, an isoquinolinyl group, a quinoxalinyl group, aquinazolinyl group, a carbazolyl group, a triazinyl group, adibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolylgroup, a dibenzocarbazolyl group and —Si(Q₃₁)(Q₃₂)(Q₃₃); and

—Si(Q₁)(Q₂)(Q₃),

Q₁ to Q₃ and Q₃₁ to Q₃₃ may each independently be selected from ahydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, aC₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenylgroup, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenylgroup, a pyrenyl group, a chrysenyl group, a pyridinyl group, apyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinylgroup, an isoquinolinyl group, a quinoxalinyl group, a quinazolinylgroup, a carbazolyl group, and a triazinyl group.

In an implementation, A₁ in Formula 1 may be selected from:

a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, an aminogroup, an amidino group, a hydrazine group, a hydrazone group, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,—P(═O)(R₂₁)(R₂₂), —P(═S)(R₂₃)(R₂₄), —S(═O)(R₂₅)(R₂₆), and —S(═O)₂(R₂₇);and

a group represented by one of Formulae 5-1 to 5-16 below.

In Formulae 5-1 to 5-16,

Y₃₁ may be O, S, C(Z₃₄)(Z₃₅) or N(Z₃₆);

Z₃₁ to Z₃₆ may each independently be selected from or include:

a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,—P(═O)(R₂₁)(R₂₂), —P(═S)(R₂₃)(R₂₄), —S(═O)(R₂₅)(R₂₆), —S(═O)₂(R₂₇), aC₁-C₂₀ alkyl group, and a C₁-C₂₀ alkoxy group;

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, a triazinyl group, adibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolylgroup, and a dibenzocarbazolyl group;

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, a triazinyl group adibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolylgroup, and a dibenzocarbazolyl group, each substituted with at least oneselected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, aC₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group and a naphthylgroup; and/or

—Si(Q₃₁)(Q₃₂)(Q₃₃).

Q₃₁ to Q₃₃ may each independently be selected from or include ahydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, aC₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenylgroup, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenylgroup, a pyrenyl group, a chrysenyl group, a pyridinyl group, apyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinylgroup, an isoquinolinyl group, a quinoxalinyl group, a quinazolinylgroup, a carbazolyl group, and/or a triazinyl group.

e1 may be an integer selected from 1, 2, 3, 4, and 5; e2 may be aninteger selected from 1, 2, 3, 4, 5, 6, and 7; e3 may be an integerselected from 1, 2, and 3; e4 may be an integer selected from 1, 2, 3,and 4; e5 may be an integer selected from 1 and 2; and * indicates abinding site to a neighboring atom.

In an implementation, A₁ in Formula 1 may be selected from, e.g., adeuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, an aminogroup, an amidino group, a hydrazine group, a hydrazone group, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,—P(═O)(R₂₁)(R₂₂), —P(═S)(R₂₃)(R₂₄), —S(═O)(R₂₅)(R₂₆), and —S(═O)₂(R₂₇);and

a group represented by one of Formulae 6-1 to 6-65 below.

* in Formulae 6-1 to 6-65 indicates a binding site to a neighboringatom, CN is a cyano group, and Ph is a phenyl group.

b1 in Formula 1 indicates the number of A₁ and may be an integerselected from 1, 2, 3, and 4. When b1 is 2 or more, a plurality of A₁may be identical or different.

R₁ to R₁₁ in Formula 1 may each independently be selected from orinclude, e.g., a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxylgroup, a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,—P(═O)(R₃₁)(R₃₂), —P(═S)(R₃₃)(R₃₄), —S(═O)(R₃₅)(R₃₆), —S(═O)₂(R₃₇), asubstituted or unsubstituted C₁-C₆₀ alkyl group, a substituted orunsubstituted C₂-C₆₀ alkenyl group, a substituted or unsubstitutedC₂-C₆₀ alkynyl group, a substituted or unsubstituted C₁-C₆₀ alkoxygroup, a substituted or unsubstituted C₃-C₁₀ cycloalkyl group, asubstituted or unsubstituted C₁-C₁₀ heterocycloalkyl group, asubstituted or unsubstituted C₃-C₁₀ cycloalkenyl group, a substituted orunsubstituted C₁-C₁₀ heterocycloalkenyl group, a substituted orunsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₆-C₆₀aryloxy group, a substituted or unsubstituted C₆-C₆₀ arylthiogroup, asubstituted or unsubstituted C₁-C₆₀ heteroaryl group, a substituted orunsubstituted monovalent non-aromatic condensed polycyclic group, asubstituted or unsubstituted monovalent non-aromatic condensedheteropolycyclic group, —Si(Q₁₁)(Q₁₂)(Q₁₃), —B(Q₁₄)(Q₁₅), and/or—N(Q₁₆)(Q₁₇).

In an implementation, R₁ to R₁₁ in Formula 1 may each independently beselected from or include a hydrogen, a deuterium, —F, —Cl, —Br, —I, ahydroxyl group, a cyano group, a nitro group, an amino group, an amidinogroup, a hydrazine group, a hydrazone group, a carboxylic acid or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, —P(═O)(R₃₁)(R₃₂), —P(═S)(R₃₃)(R₃₄), —S(═O)(R₃₅)(R₃₆),—S(═O)₂(R₃₇), a substituted or unsubstituted C₁-C₂₀ alkyl group, asubstituted or unsubstituted C₁-C₂₀ alkoxy group, a substituted orunsubstituted C₆-C₂₀ aryl group, a substituted or unsubstituted C₁-C₂₀heteroaryl group, a substituted or unsubstituted monovalent non-aromaticcondensed polycyclic group, a substituted or unsubstituted monovalentnon-aromatic condensed heteropolycyclic group, and/or—Si(Q₁₁)(Q₁₂)(Q₁₃).

In an implementation, R₁ to R₁₁ in Formula 1 may each independently beselected from or include, e.g., a hydrogen, a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, —P(═O)(R₃₁)(R₃₂), —P(═S)(R₃₃)(R₃₄), —S(═O)(R₃₅)(R₃₆),—S(═O)₂(R₃₇), a substituted or unsubstituted C₁-C₂₀ alkyl group, and/ora substituted or unsubstituted C₁-C₂₀ alkoxy group.

R₂₁ to R₂₇ and R₃₁ to R₃₇ in Formula 1 may each independently beselected from or include, e.g., a hydrogen, a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a substituted orunsubstituted C₁-C₆₀ alkyl group, a substituted or unsubstituted C₂-C₆₀alkenyl group, a substituted or unsubstituted C₂-C₆₀ alkynyl group, asubstituted or unsubstituted C₁-C₆₀ alkoxy group, a substituted orunsubstituted C₃-C₁₀ cycloalkyl group, a substituted or unsubstitutedC₁-C₁₀ heterocycloalkyl group, a substituted or unsubstituted C₃-C₁₀cycloalkenyl group, a substituted or unsubstituted C₁-C₁₀heterocycloalkenyl group, a substituted or unsubstituted C₆-C₆₀ arylgroup, a substituted or unsubstituted C₁-C₆₀ heteroaryl group, asubstituted or unsubstituted monovalent non-aromatic condensedpolycyclic group, and/or a substituted or unsubstituted monovalentnon-aromatic condensed heteropolycyclic group.

In an implementation, R₂₁ to R₂₇, and R₃₁ to R₃₇ in Formula 1 may eachindependently be selected from or include, e.g., a substituted orunsubstituted C₆-C₂₀ aryl group, a substituted or unsubstituted C₁-C₂₀heteroaryl group, a substituted or unsubstituted monovalent non-aromaticcondensed polycyclic group, and/or a substituted or unsubstitutedmonovalent non-aromatic condensed heteropolycyclic group.

In an implementation, R₂₁ to R₂₇ and R₃₁ to R₃₇ in Formula 1 may eachindependently be selected from or include:

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, a triazinyl group, adibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolylgroup, and a dibenzocarbazolyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, a triazinyl group adibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolylgroup, and/or a dibenzocarbazolyl group, each substituted with at leastone selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, acyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenylgroup, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenylgroup, a pyrenyl group, a chrysenyl group, a pyridinyl group, apyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinylgroup, an isoquinolinyl group, a quinoxalinyl group, a quinazolinylgroup, a carbazolyl group, a triazinyl group a dibenzofuranyl group, adibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolylgroup, and —Si(Q₃₁)(Q₃₂)(Q₃₃).

In an implementation, R₂₁ to R₂₇ and R₃₁ to R₃₇ in Formula 1 may eachindependently be selected from or include a phenyl group, a naphthylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, and a triazinyl group; and

a phenyl group, a naphthyl group, an anthracenyl group, a pyrenyl group,a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, and a triazinyl group, each substituted withat least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxylgroup, a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group and anaphthyl group.

In an implementation, R₂₁ to R₂₇ may each independently be selected fromor include a phenyl group, a naphthyl group, a pyridinyl group, apyrazinyl group, a pyrimidinyl group, a pyridazinyl group, and atriazinyl group; and

a phenyl group, a naphthyl group, a pyridinyl group, a pyrazinyl group,a pyrimidinyl group, a pyridazinyl group, and a triazinyl group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenylgroup, and a naphthyl group.

In an implementation, the compound represented by Formula 1 may be,e.g., represented by Formula 1A below.

L₁, a1, A₁, and b₁ in Formula 1A may be the same as described above withrespect to Formula 1.

For example, in Formula 1A, L₁ may be selected from a group representedby one of Formulae 4-1 to 4-32, and a1 may be selected from 0, 1, and 2.

In an implementation, A₁ in Formula 1 may be selected from or include,e.g., a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, anamino group, an amidino group, a hydrazine group, a hydrazone group, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,—P(═O)(R₂₁)(R₂₂), —P(═S)(R₂₃)(R₂₄), —S(═O)(R₂₅)(R₂₆), and —S(═O)₂(R₂₇);and

a group represented by one of Formulae 6-1 to 6-65 as described above.

R₂₁ to R₂₇ may each independently be selected from or include a phenylgroup, a naphthyl group, an anthracenyl group, a pyrenyl group, achrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, and a triazinyl group; and

a phenyl group, a naphthyl group, an anthracenyl group, a pyrenyl group,a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, and a triazinyl group, each substituted withat least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxylgroup, a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, and anaphthyl group.

In an implementation, the condensed cyclic compound represented byFormula 1 may be one of Compounds 1 to 100 below.

The condensed cyclic compound represented by Formula 1 may have a coremoiety represented by Formula 1′ below. For example, the condensedcyclic compound may have electrochemical stability, and accordingly, anorganic light-emitting device using the condensed cyclic compoundrepresented by Formula 1 may have high efficiency.

In the condensed cyclic compound represented by Formula 1, b1 may be aninteger selected from 1, 2, 3, and 4, and A₁ may not be a hydrogen. Forexample the core moiety represented by Formula 1′ may necessarily besubstituted with -[(L₁)_(a1)-(A₁)_(b1)], and not a hydrogen, thecondensed cyclic compound may have an energy level that is appropriatefor use as a material for an organic light-emitting device, e.g., anelectron transport material. Accordingly, an organic light-emittingdevice using the condensed cyclic compound represented by Formula 1 mayhave high efficiency.

The condensed cyclic compound represented by Formula 1 may besynthesized by using a suitable organic synthetic method. A synthesismethod of the condensed cyclic compound may be understood in view of thefollowing embodiments.

The condensed cyclic compound of Formula 1 may be used or includedbetween a pair of electrodes of an organic light-emitting device. In animplementation, the condensed cyclic compound may be included anelectron transport region, e.g., an electron transport layer. Forexample, an organic light-emitting device according to an embodiment mayinclude: a first electrode; a second electrode facing the firstelectrode; and an organic layer that is disposed between the firstelectrode and the second electrode and includes an emission layer,wherein the organic layer includes at least one of the condensed cycliccompounds described above.

The expression that “(an organic layer) includes at least one condensedcyclic compound” used herein may include a case in which “(an organiclayer) includes identical compounds represented by Formula 1 and a casein which (an organic layer) includes two or more different condensedcyclic compounds represented by Formula 1.

For example, the organic layer may include, as the condensed cycliccompound, only Compound 1. In this regard, Compound 1 may exist in anelectron transport layer of the organic light-emitting device. Inanother embodiment, the organic layer may include, as the condensedcyclic compound, Compound 1 and Compound 2. In this regard, Compound 1and Compound 2 may exist in an identical layer (for example, Compound 1and Compound 2 may all exist in an electron transport layer), ordifferent layers (for example, Compound 1 may exist in an emission layerand Compound 2 may exist in an electron transport layer).

The organic layer may include, e.g., i) a hole transport region that isbetween the first electrode (anode) and the emission layer and thatincludes at least one of a hole injection layer, a hole transport layer,a buffer layer, and an electron blocking layer, and ii) an electrontransport region that is between the emission layer and the secondelectrode (cathode) and that includes at least one selected from a holeblocking layer, an electron transport layer, and an electron injectionlayer. The electron transport region may include at least one condensedcyclic compound represented by Formula 1. For example, the electrontransport region may include the electron transport layer, and theelectron transport layer may include at least one condensed cycliccompound represented by Formula 1.

The term “organic layer” used herein refers to a single layer and/or aplurality of layers disposed between the first electrode and the secondelectrode of an organic light-emitting device. A material included inthe “organic layer” is not limited to an organic material.

FIG. 1 illustrates a schematic view of an organic light-emitting device10 according to an embodiment. The organic light-emitting device 10 mayinclude a first electrode 110, an organic layer 150, and a secondelectrode 190.

Hereinafter, the structure of an organic light-emitting device accordingto an embodiment and a method of manufacturing an organic light-emittingdevice according to an embodiment will be described in connection withFIG. 1.

In FIG. 1, a substrate may be additionally disposed under the firstelectrode 110 or above the second electrode 190. The substrate may be aglass substrate or transparent plastic substrate, each with excellentmechanical strength, thermal stability, transparency, surfacesmoothness, ease of handling, and water repellency.

The first electrode 110 may be formed by depositing or sputtering amaterial for forming the first electrode on the substrate. When thefirst electrode 110 is an anode, the material for the first electrodemay be selected from materials with a high work function to facilitatehole injection. The first electrode 110 may be a reflective electrode ora transmissive electrode. The material for the first electrode may be atransparent and highly conductive material, and examples of such amaterial are indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide(SnO₂), and zinc oxide (ZnO). When the first electrode 110 is asemi-transmissive electrode or a reflective electrode, as a material forforming the first electrode, at least one of magnesium (Mg),aluminum(Al), aluminum-lithium(Al—Li), calcium (Ca),magnesium-indium(Mg—In), magnesium-silver (Mg—Ag) may be used.

The first electrode 110 may have a single-layer structure, or amulti-layer structure including two or more layers. For example, thefirst electrode 110 may have a three-layered structure of ITO/Ag/ITO,but the structure of the first electrode 110 is not limited thereto.

The organic layer 150 may be disposed on the first electrode 110. Theorganic layer 150 may include an emission layer.

The organic layer 150 may further include a hole transport regionbetween the first electrode and the emission layer, and an electrontransport region between the emission layer and the second electrode.

The hole transport region may include at least one selected from a holeinjection layer (HIL), a hole transport layer (HTL), a buffer layer, andan electron blocking layer (EBL), and the electron transport region mayinclude at least one selected from a hole blocking layer (HBL), anelectron transport layer (ETL), and an electron injection layer (EIL),but they are not limited thereto.

The hole transport region may have a single-layered structure formed ofa single material, a single-layered structure formed of a plurality ofdifferent materials, or a multi-layered structure having a plurality oflayers formed of a plurality of different materials.

For example, the hole transport region may have a single-layeredstructure formed of a plurality of different materials, or a structureof hole injection layer/hole transport layer, a structure of holeinjection layer/hole transport layer/buffer layer, a structure of holeinjection layer/buffer layer, a structure of hole transport layer/bufferlayer, or a structure of hole injection layer/hole transportlayer/electron blocking layer, wherein layers of each structure aresequentially stacked from the first electrode 110 in this stated order.

When the hole transport region includes a hole injection layer, the holeinjection layer may be formed on the first electrode 110 by usingvarious methods, e.g., vacuum deposition, spin coating casting, aLangmuir-Blodgett (LB) method, ink-jet printing, laser-printing, orlaser-induced thermal imaging.

When a hole injection layer is formed by vacuum deposition, e.g., thevacuum deposition may be performed at a temperature of a depositiontemperature of about 100 to about 500° C., at a vacuum degree of about10⁻⁸ to about 10⁻³ torr, and/or at a deposition rate of about 0.01 toabout 100 Å/sec, in consideration of a compound for a hole injectionlayer to be deposited, and the structure of a hole injection layer to beformed.

When a hole injection layer is formed by spin coating, the spin coatingmay be performed at a coating rate of about 2,000 rpm to about 5,000rpm, and at a temperature of about 80° C. to 200° C., in considerationof a compound for a hole injection layer to be deposited, and thestructure of a hole injection layer to be formed.

When the hole transport region includes a hole transport layer, the holetransport layer may be formed on the first electrode 110 or the holeinjection layer by using various methods, e.g., vacuum deposition, spincoating, casting, a LB method, ink-jet printing, laser-printing, orlaser-induced thermal imaging. When the hole transport layer is formedby vacuum deposition or spin coating, deposition and coating conditionsfor the hole transport layer may be determined by referring to thedeposition and coating conditions for the hole injection layer.

The hole transport region may include at least one selected fromm-MTDATA, TDATA, 2-TNATA, NPB, β-NPB, TPD, Spiro-TPD, Spiro-NPB, α-NPB,TAPC, HMTPD, 4,4′,4″-tris(N-carbazolyl)triphenylamine (TCTA),polyaniline/dodecylbenzenesulfonic acid (Pani/DBSA),poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) (PEDOT/PSS),polyaniline/camphor sulfonicacid (PANI/CSA),(polyaniline)/poly(4-styrenesulfonate) (Pani/PSS), a compoundrepresented by Formula 201 below, and a compound represented by Formula202 below.

In Formulae 201 and 202,

L₂₀₁ to L₂₀₅ may be the same as explained in connection with L₁;

xa1 to xa4 may be each independently selected from 0, 1, 2, and 3;

xa5 may be selected from 1, 2, 3, 4, and 5; and

R₂₀₁ to R₂₀₄ may be selected from a substituted or unsubstituted C₃-C₁₀cycloalkyl group, a substituted or unsubstituted C₁-C₁₀ heterocycloalkylgroup, a substituted or unsubstituted C₃-C₁₀ cycloalkenyl group, asubstituted or unsubstituted C₁-C₁₀ heterocycloalkenyl group, asubstituted or unsubstituted C₆-C₆₀ aryl group, a substituted orunsubstituted C₆-C₆₀ aryloxy group, a substituted or unsubstitutedC₆-C₆₀ arylthio group, a substituted or unsubstituted C₁-C₆₀ heteroarylgroup, a substituted or unsubstituted monovalent non-aromatic condensedpolycyclic group, and a substituted or unsubstituted monovalentnon-aromatic condensed heteropolycyclic group.

In an implementation, in Formulae 201 and 202,

L₂₀₁ to L₂₀₅ may be each independently selected from:

a phenylene group, a naphthylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorene group, a dibenzofluorenegroup, a phenanthrenylene group, an anthracenylene group, a pyrenylenegroup, a chrysenylene group, a pyridinylene group, a pyrazinylene group,a pyrimidinylene group, a pyridazinylene group, a quinolinylene group,an isoquinolinylene group, a quinoxalinylene group, a quinazolinylenegroup, a carbazolylene group, and a triazinylene group; and

a phenylene group, a naphthylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorene group, a dibenzofluorenegroup, a phenanthrenylene group, an anthracenylene group, a pyrenylenegroup, a chrysenylene group, a pyridinylene group, a pyrazinylene group,a pyrimidinylene group, a pyridazinylene group, a quinolinylene group,an isoquinolinylene group, a quinoxalinylene group, a quinazolinylenegroup, a carbazolylene group, and a triazinylene group, each substitutedwith at least one of a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, acyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenylgroup, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenylgroup, a pyrenyl group, a chrysenyl group, a pyridinyl group, apyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group;

xa1 to xa4 may be each independently 0, 1, or 2;

xa5 may be 1, 2, or 3;

R₂₀₁ to R₂₀₄ may be each independently selected from:

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group, eachsubstituted with at least one of a deuterium, —F, —Cl, —Br, —I, ahydroxyl group, a cyano group, a nitro group, an amino group, an amidinogroup, a hydrazine group, a hydrazone group, a carboxylic acid or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, anaphthyl group, an azulenyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group.

The compound represented by Formula 201 may be represented by Formula201A:

In an implementation, the compound represented by Formula 201 may berepresented by Formula 201A-1 below.

In an implementation, the compound represented by Formula 202 may berepresented by Formula 202A below.

L₂₀₁ to L₂₀₃, xa1 to xa3, xa5, and R₂₀₂ to R₂₀₄ in Formulae 201A,201A-1, and 202A are already described above, R₂₁₁ may be the same asdefined in connection with R₂₀₃, and R₂₁₃ to R₂₁₆ may be eachindependently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, ahydroxyl group, a cyano group, a nitro group, an amino group, an amidinogroup, a hydrazine group, a hydrazone group, a carboxylic acid group ora salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid ora salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group, aC₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, and a monovalent non-aromaticcondensed heteropolycyclic group.

For example, in Formulae 201A, 201A-1, and 202A,

L₂₀₁ to L₂₀₃ may each independently be selected from:

a phenylene group, a naphthylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorenylene group, adibenzofluorenylene group, a phenanthrenylene group, an anthracenylenegroup, a pyrenylene group, a chrysenylene group, a pyridinylene group, apyrazinylene group, a pyrimidinylene group, a pyridazinylene group, aquinolinylene group, an isoquinolinylene group, a quinoxalinylene group,a quinazolinylene group, a carbazolylene group, and a triazinylenegroup; and

a phenylene group, a naphthylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorenylene group, adibenzofluorenylene group, a phenanthrenylene group, an anthracenylenegroup, a pyrenylene group, a chrysenylene group, a pyridinylene group, apyrazinylene group, a pyrimidinylene group, a pyridazinylene group, aquinolinylene group, an isoquinolinylene group, a quinoxalinylene group,a quinazolinylene group, a carbazolylene group, and a triazinylenegroup, each substituted with at least one selected from a deuterium, —F,—Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an aminogroup, an amidino group, a hydrazine group, a hydrazone group, acarboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, aphosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxygroup, a phenyl group, a naphthyl group, a fluorenyl group, aspiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group,a phenanthrenyl group, an anthracenyl group, a pyrenyl group, achrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group,a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and atriazinyl group;

xa1 to xa3 may be each independently 0 or 1;

R₂₀₃, R₂₁₁, and R₂₁₂ may each independently be selected from:

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group, eachsubstituted with at least one of a deuterium, —F, —Cl, —Br, —I, ahydroxyl group, a cyano group, a nitro group, an amino group, an amidinogroup, a hydrazine group, a hydrazone group, a carboxylic acid or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, anaphthyl group, a fluorenyl group, a spiro-fluorenyl group, abenzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group,an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinylgroup, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, aquinolinyl group, an isoquinolinyl group, a quinoxalinyl group, aquinazolinyl group, a carbazolyl group, and a triazinyl group;

R₂₁₃ and R₂₁₄ may each independently be selected from:

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group;

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group,a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group;

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group and a triazinyl group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenylgroup, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, abenzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group,an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinylgroup, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, aquinolinyl group, an isoquinolinyl group, a quinoxalinyl group, aquinazolinyl group, a carbazolyl group, and a triazinyl group;

R₂₁₅ and R₂₁₆ may each independently be selected from:

a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, aC₁-C₂₀ alkyl group, and a C₁-C₂₀ alkoxy group;

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group,a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group;

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, and a triazinyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group and a triazinyl group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenylgroup, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, abenzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group,an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinylgroup, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, aquinolinyl group, an isoquinolinyl group, a quinoxalinyl group, aquinazolinyl group, a carbazolyl group, and a triazinyl group;

xa5 may be 1 or 2.

In an implementation, R₂₁₃ and R₂₁₄ in Formulae 201A, and 201A-1 maybind to each other to form a saturated or unsaturated ring.

In an implementation, the compound represented by Formula 201, and thecompound represented by Formula 202 may each include compounds HT1 toHT20 illustrated below.

A thickness of the hole transport region may be in a range of about 100Å to about 10,000 Å, e.g., about 100 Å to about 1,000 Å. When the holetransport region includes a hole injection layer and a hole transportlayer, the thickness of the hole injection layer may be in a range ofabout 100 Å to about 10,000 Å, e.g., about 100 Å to about 1,000 Å, andthe thickness of the hole transport layer may be in a range of about 50Å to about 2,000 Å, e.g., about 100 Å to about 1,500 Å. When thethicknesses of the hole transport region, the hole injection layer, andthe hole transport layer are within these ranges, satisfactory holetransporting characteristics may be obtained without a substantialincrease in driving voltage.

The hole transport region may further include, in addition to thesematerials, a charge-generation material for the improvement ofconductive properties. The charge-generation material may behomogeneously or non-homogeneously dispersed in the hole transportregion.

The charge-generation material may be, e.g., a p-dopant. The p-dopantmay include one of a quinone derivative, a metal oxide, and a cyanogroup-containing compound, but is not limited thereto. Examples of thep-dopant may include a quinone derivative, such astetracyanoquinonedimethane (TCNQ) or2,3,5,6-tetrafluoro-tetracyano-1,4-benzoquinonedimethane (F4-TCNQ); ametal oxide, such as a tungsten oxide or a molybdenum oxide, andCompound HT-D1 illustrated below.

The hole transport region may further include, in addition to the holeinjection layer and the hole transport layer, at least one of a bufferlayer and an electron blocking layer. Since the buffer layer maycompensate for an optical resonance distance according to a wavelengthof light emitted from the emission layer, light-emission efficiency of aformed organic light-emitting device may be improved. For use as amaterial included in the buffer layer, materials that are included inthe hole transport region may be used. The electron blocking layerprevents injection of electrons from the electron transport region.

An emission layer may be formed on the first electrode 110 or the holetransport region by using various methods, e.g., vacuum deposition, spincoating, casting, a LB method, ink jet printing, laser-printing, orlaser-induced thermal imaging. When the emission layer is formed byvacuum deposition or spin coating, deposition and coating conditions forthe emission layer may be determined by referring to the deposition andcoating conditions for the hole injection layer.

When the organic light-emitting device 10 is a full color organiclight-emitting device, the emission layer may be patterned into a redemission layer, a green emission layer, or a blue emission layer,according to a sub pixel. In an implementation, the emission layer mayhave a stacked structure of a red emission layer, a green emissionlayer, and a blue emission layer, or may include a red-light emissionmaterial, a green-light emission material, and a blue-light emissionmaterial, which are mixed with each other in a single layer, to emitwhite light.

The emission layer may include a host and a dopant.

The host may include at least one selected from TPBi, TBADN, ADN (alsoreferred to as “DNA”), CBP, CDBP, and TCP:

In an implementation, the host may include a compound represented byFormula 301 below.Ar₃₀₁-[(L₃₀₁)_(xe1)-E₃₀₁]_(xe2)  <Formula 301>

In Formula 301,

Ar₃₀₁ may be selected from:

a naphthalene group, a heptalene group, a fluorenene group, aspiro-fluorenene group, a benzofluorenene group, a dibenzofluorenenegroup, a phenalene group, a phenanthrene group, an anthracene group, afluoranthene group, a triphenylene group, a pyrene group, a chrysenegroup, a naphthacene group, a picene group, a perylene group, apentaphene group, and an indenoanthracene group;

a naphthalene group, a heptalene group, a fluorenene group, aspiro-fluorenene group, a benzofluorenene group, a dibenzofluorenenegroup, a phenalene group, a phenanthrene group, a anthracene group, afluoranthene group, a triphenylene group, a pyrene group, a chrysenegroup, a naphthacene group, a picene group, a perylene group, apentaphene group, and an indenoanthracene group, each substituted withat least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxylgroup, a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid group or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynylgroup, a C₁-C₆₀ alkoxy, a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy, aC₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed heteropolycyclic group, and —Si(Q₃₀₁)(Q₃₀₂)(Q₃₀₃) (whereinQ₃₀₁ to Q₃₀₃ are each independently selected from a hydrogen, a C₁-C₆₀alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ aryl group, and a C₁-C₆₀heteroaryl group);

L₃₀₁ may be the same as explained in connection with L₂₀₁;

R₃₀₁ may be selected from:

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group;

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group,a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group;

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenylgroup, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, abenzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group,an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinylgroup, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, aquinolinyl group, an isoquinolinyl group, a quinoxalinyl group, aquinazolinyl group, a carbazolyl group, and a triazinyl group;

xb1 may be selected from 0, 1, 2, and 3;

xb2 may be selected from 1, 2, 3, and 4.

wherein in Formula 301,

L₃₀₁ may be selected from:

a phenylene group, a naphthylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorenylene group, adibenzofluorenylene group, a phenanthrenylene group, an anthracenylenegroup, a pyrenylene group, and a chrysenylene group; and

a phenylene group, a naphthylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorenylene group, adibenzofluorenylene group, a phenanthrenylene group, an anthracenylenegroup, a pyrenylene group, and a chrysenylene group, each substitutedwith at least one of a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, acyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenylgroup, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenylgroup, a pyrenyl group, and a chrysenyl group;

R₃₀₁ may be selected from:

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group;

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group, each substituted with atleast one of a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, aphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, and a chrysenyl group;

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, and a chrysenyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, and a chrysenyl group,each substituted with at least one of a deuterium, —F, —Cl, —Br, —I, ahydroxyl group, a cyano group, a nitro group, an amino group, an amidinogroup, a hydrazine group, a hydrazone group, a carboxylic acid or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, anaphthyl group, a fluorenyl group, a spiro-fluorenyl group, abenzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group,an anthracenyl group, a pyrenyl group, and a chrysenyl group, but is notlimited thereto.

In an implementation, the host may include a compound represented byFormula 301A below.

Substituents of Formula 301A may be understood by correspondingdescriptions provided herein.

The compound represented by Formula 301 may include at least one ofCompounds H1 to H42.

In an implementation, the host may include at least one of Compounds H43to H49 below.

The dopant may be at least one selected from a fluorescent dopant and aphosphorescent dopant.

In an implementation, the phosphorescent dopant may include anorganometallic complex represented by Formula 401 below.

In Formula 401,

M may be selected from iridium (Ir), platinum (Pt), osmium (Os),titanium (Ti), zirconium (Zr), hafnium (Hf), europium (Eu), terbium(Tb), and thulium (Tm);

X₄₀₁ to X₄₀₄ may each independently be nitrogen or carbon;

rings A₄₀₁ and A₄₀₂ may each independently be selected from asubstituted or unsubstituted benzene, a substituted or unsubstitutednaphthalene, a substituted or unsubstituted fluorenene, a substituted orunsubstituted spiro-fluorenene, a substituted or unsubstituted indene, asubstituted or unsubstituted pyrrol, a substituted or unsubstitutedthiophene, a substituted or unsubstituted furan, a substituted orunsubstituted imidazole, a substituted or unsubstituted pyrazole, asubstituted or unsubstituted thiazole, a substituted or unsubstitutedisothiazole, a substituted or unsubstituted oxazole, a substituted orunsubstituted isoxazole, a substituted or unsubstituted pyridine, asubstituted or unsubstituted pyrazine, a substituted or unsubstitutedpyrimidine, a substituted or unsubstituted pyridazine, a substituted orunsubstituted quinoline, a substituted or unsubstituted isoquinoline, asubstituted or unsubstituted benzoquinoline, a substituted orunsubstituted quinoxaline, a substituted or unsubstituted quinazoline, asubstituted or unsubstituted carbazol, a substituted or unsubstitutedbenzoimidazole, a substituted or unsubstituted benzofuran, a substitutedor unsubstituted benzothiophene, a substituted or unsubstitutedisobenzothiophene, a substituted or unsubstituted benzooxazole, asubstituted or unsubstituted isobenzooxazole, a substituted orunsubstituted triazole, a substituted or unsubstituted oxadiazole, asubstituted or unsubstituted triazine, a substituted or unsubstituteddibenzofuran, and a substituted or unsubstituted dibenzothiophene; and

at least one substituent of the substituted benzene, substitutednaphthalene, substituted fluorenene, substituted spiro-fluorenene,substituted indene, substituted pyrrol, substituted thiophene,substituted furan, substituted imidazole, substituted pyrazole,substituted thiazole, substituted isothiazole, substituted oxazole,substituted isoxazole, substituted pyridine, substituted pyrazine,substituted pyrimidine, substituted pyridazine, substituted quinoline,substituted isoquinoline, substituted benzoquinoline, substitutedquinoxaline, substituted quinazoline, substituted carbazol, substitutedbenzoimidazole, substituted benzofuran, substituted benzothiophene,substituted isobenzothiophene, substituted benzooxazole, substitutedisobenzooxazole, substituted triazole, substituted oxadiazole,substituted triazine, substituted dibenzofuran, and substituteddibenzothiophene may be selected from

a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid or a salt thereof, a sulfonic acid or a saltthereof, a phosphoric acid or a salt thereof, a C₁-C₆₀ alkyl group, aC₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and a C₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid group or a salt thereof, a sulfonicacid group or a salt thereof, a phosphoric acid group or a salt thereof,a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,a monovalent non-aromatic condensed heteropolycyclic group,—N(Q₄₀₁)(Q₄₀₂), —Si(Q₄₀₃)(Q₄₀₄)(Q₄₀₅), and —B(Q₄₀₆)(Q₄₀₇);

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic heterocondensed polycyclic group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid group or a salt thereof, aphosphoric acid group or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, amonovalent non-aromatic condensed polycyclic group, a monovalentnon-aromatic heterocondensed polycyclic group, —N(Q₄₁₁)(Q₄₁₂),—Si(Q₄₁₃)(Q₄₁₄)(Q₄₁₅), and —B(Q₄₁₆)(Q₄₁₇); and

—N(Q₄₂₁)(Q₄₂₂), —Si(Q₄₂₃)(Q₄₂₄)(Q₄₂₅), or —B(Q₄₂₆)(Q₄₂₇);

L₄₀₁ may be an organic ligand;

xc1 may be 1, 2, or 3; and

xc2 may be 0, 1, 2, or 3.

L₄₀₁ may be a monovalent, divalent, or trivalent organic ligand. Forexample, L₄₀₁ may be selected from a halogen ligand (for example, Cl orF), a diketone ligand (for example, acetylacetonate,1,3-diphenyl-1,3-propandionate, 2,2,6,6-tetramethyl-3,5-heptandionate,or hexafluoroacetonate), a carboxylic acid ligand (for example,picolinate, dimethyl-3-pyrazolecarboxylate, or benzoate), a carbonmonooxide ligand, an isonitrile ligand, a cyano ligand, and aphosphorous ligand (for example, phosphine, and phosphaite), but is notlimited thereto.

When A₄₀₁ in Formula 401 has two or more substituents, the substituentsof A₄₀₂ may bind to each other to form a saturated or unsaturated ring.

When A₄₀₂ in Formula 402 has two or more substituents, the substituentsof A₄₀₂ may bind to each other to form a saturated or unsaturated ring.

When xc1 in Formula 401 is two or more, a plurality of ligands

in Formula 401 may be identical or different. When xc1 in Formula 401 istwo or more, A₄₀₁ and A₄₀₂ may be respectively directly connected toA₄₀₁ and A₄₀₂ of other neighboring ligands with or without a linker (forexample, a C₁-C₅ alkylene, or —N(R′)— (wherein R′ may be a C₁-C₁₀ alkylgroup or a C₆-C₂₀ aryl group) or —C(═O)—) therebetween.

In an implementation, the phosphorescent dopant may include at least oneof Compounds PD1 to PD74 below.

In an implementation, the phosphorescent dopant may include PtOEP.

In an implementation, the fluorescent dopant may include at least oneselected from DPAVBi, BDAVBi, TBPe, DCM, DCJTB, Coumarin 6, and C545T.

In an implementation, the fluorescent dopant may include a compoundrepresented by Formula 501 below.

In Formula 501,

Ar₅₀₁ may be selected from:

a naphthalene group, a heptalene group, a fluorenene group, aspiro-fluorenene group, a benzofluorenene group, a dibenzofluorenenegroup, a phenalene group, a phenanthrene group, an anthracene group, afluoranthene group, a triphenylene group, a pyrene group, a chrysenegroup, a naphthacene group, a picene group, a perylene group, apentaphene group, and an indenoanthracene group;

a naphthalene group, a heptalene group, a fluorenene group, aspiro-fluorenene group, a benzofluorenene group, a dibenzofluorenenegroup, a phenalene group, a phenanthrene group, a anthracene group, afluoranthene group, a triphenylene group, a pyrene group, a chrysenegroup, a naphthacene group, a picene group, a perylene group, apentaphene group, and an indenoanthracene group, each substituted withat least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxylgroup, a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid group or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynylgroup, a C₁-C₆₀ alkoxy, a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy, aC₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed heteropolycyclic group, and —Si(Q₅₀₁)(Q₅₀₂)(Q₅₀₃) (whereinQ₅₀₁ to Q₅₀₃ are each independently selected from a hydrogen, a C₁-C₆₀alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ aryl group, and a C₁-C₆₀heteroaryl group);

L₅₀₁ to L₅₀₃ may be the same as defined in connection with L₂₀₁;

R₅₀₁ and R₅₀₂ may each independently be selected from:

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, a triazinyl group, adibenzofuranyl group, and a dibenzothiophenyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, a triazinyl group, adibenzofuranyl group, and a dibenzothiophenyl group, each substitutedwith at least one of a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, acyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenylgroup, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenylgroup, a pyrenyl group, a chrysenyl group, a pyridinyl group, apyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinylgroup, an isoquinolinyl group, a quinoxalinyl group, a quinazolinylgroup, a carbazolyl group, a triazinyl group, a dibenzofuranyl group,and a dibenzothiophenyl group;

xd1 to xd3 may each independently be selected from 0, 1, 2, and 3; and

xb4 may be selected from 1, 2, 3, and 4.

The fluorescent host may include at least one of Compounds FD1 to FD9illustrated below.

An amount of the dopant in the emission layer may be, e.g., in a rangeof about 0.01 to about 15 parts by weight, based on 100 parts by weightof the host, but is not limited thereto.

A thickness of the emission layer may be in a range of about 100 Å toabout 1,000 Å, e.g., about 200 Å to about 600 Å. When the thickness ofthe emission layer is within this range, excellent light-emissioncharacteristics may be obtained without a substantial increase indriving voltage.

Then, an electron transport region may be disposed on the emissionlayer.

The electron transport region may include at least one selected from ahole blocking layer, an electron transport layer (ETL), and an electroninjection layer.

For example, the electron transport region may have a structure ofelectron transport layer/electron injection layer or a structure of holeblocking layer/electron transport layer/electron injection layer,wherein layers of each structure may be sequentially stacked from theemission layer in the stated order.

According to an embodiment, the organic layer 150 of the organiclight-emitting device may include an electron transport region disposedbetween the emission layer and the second electrode 190, and theelectron transport region may include at least one condensed cycliccompound represented by Formula 1.

The electron transport region may include a hole blocking layer. Thehole blocking layer may be formed, when the emission layer includes aphosphorescent dopant, to help prevent diffusion of excitons or holesinto an electron transport layer.

When the electron transport region includes a hole blocking layer, thehole blocking layer may be formed on the emission layer by using variousmethods, e.g., vacuum deposition, spin coating casting, a LB method,ink-jet printing, laser-printing, or laser-induced thermal imaging. Whenthe hole blocking layer is formed by vacuum deposition or spin coating,deposition and coating conditions for the hole blocking layer may bedetermined by referring to the deposition and coating conditions for thehole injection layer.

The hole blocking layer may include, e.g., BCP or Bphen.

A thickness of the hole blocking layer may be in a range of about 20 Åto about 1,000 Å, e.g., about 30 Å to about 300 Å. When the thickness ofthe hole blocking layer is within these ranges, the hole blocking layermay have improved hole blocking ability without a substantial increasein driving voltage.

The electron transport region may include an electron transport layer.The electron transport layer may be formed on the emission layer or thehole blocking layer by using various methods, e.g., vacuum deposition,spin coating casting, a LB method, ink-jet printing, laser-printing, orlaser-induced thermal imaging. When an electron transport layer isformed by vacuum deposition or spin coating, deposition and coatingconditions for the electron transport layer may be determined byreferring to the deposition and coating conditions for the holeinjection layer.

According to an embodiment, the organic layer 150 of the organiclight-emitting device may include the electron transport region disposedbetween the emission layer and the second electrode 190, and theelectron transport region may include the electron transport layer. Theelectron transport layer may include at least one compound representedby Formula 1.

The electron transport layer may further include, in addition to thecondensed cyclic compound represented by Formula 1, at least oneselected from BCP, Bphen, and Alg₃, BAlq, and NTAZ, which areillustrated below.

A thickness of the electron transport layer may be in a range of about100 Å to about 1,000 Å, e.g., about 150 Å to about 500 Å. When thethickness of the electron transport layer is within the range describedabove, the electron transport layer may have satisfactory electrontransport characteristics without a substantial increase in drivingvoltage.

In an implementation, the electron transport layer may further include,in addition to the materials described above, a metal-containingmaterial.

The metal-containing material may include a Li complex. The Li complexmay include, for example, Compound ET-D1 (lithium quinolate, LiQ) orET-D2.

The electron transport region may include an electron injection layerthat allows electrons to be easily provided from the second electrode190.

The electron injection layer may be formed on the electron transportlayer by using various methods, e.g., vacuum deposition, spin coatingcasting, a LB method, ink-jet printing, laser-printing, or laser-inducedthermal imaging. When an electron injection layer is formed by vacuumdeposition or spin coating, deposition and coating conditions for theelectron injection layer may be determined by referring to thedeposition and coating conditions for the hole injection layer.

The electron injection layer may include at least one selected from,LiF, NaCl, CsF, Li₂O, BaO, and LiQ.

A thickness of the electron injection layer may be in a range of about 1Å to about 100 Å, e.g., about 3 Å to about 90 Å. When the thickness ofthe electron injection layer is within the range described above, theelectron injection layer may have satisfactory electron injectioncharacteristics without a substantial increase in driving voltage.

The second electrode 190 may be disposed on the organic layer 150 havingsuch a structure. The second electrode 190 may be a cathode, e.g., anelectron injection electrode, and in this regard, a material for formingthe second electrode 190 may be a material having a low work function,and such a material may be metal, alloy, an electrically conductivecompound, or a mixture thereof. Detailed examples of the secondelectrode 190 may include lithium (Li), magnesium (Mg), aluminum (Al),aluminum-lithium (Al—Li), calcium (Ca), magnesium-indium (Mg—In), ormagnesium-silver (Mg—Ag). In an implementation, the material for formingthe second electrode 190 may be ITO or IZO. The second electrode 190 maybe a reflective electrode, a semi-transmissive electrode, or atransmissive electrode.

Hereinbefore, the organic light-emitting device has been described withreference to FIG. 1, but is not limited thereto.

A C₁-C₆₀ alkyl group used herein refers to a linear or branchedaliphatic hydrocarbon monovalent group having 1 to 60 carbon atoms, anddetailed examples thereof are a methyl group, an ethyl group, a propylgroup, an isobutyl group, a sec-butyl group, a ter-butyl group, a pentylgroup, an iso-amyl group, and a hexyl group. A C₁-C₆₀ alkylene groupused herein refers to a divalent group having the same structure as theC₁-C₆₀ alkyl group.

A C₁-C₆₀ alkoxy group used herein refers to a monovalent grouprepresented by —OA₁₀₁ (wherein A₁₀₁ is the C₁-C₆₀ alkyl group), anddetailed examples thereof are a methoxy group, an ethoxy group, and anisopropyloxy group.

A C₂-C₆₀ alkenyl group used herein refers to a hydrocarbon group formedby substituting at least one carbon double bond in the middle orterminal of the C₂-C₆₀ alkyl group, and detailed examples thereof are anethenyl group, a prophenyl group, and a butenyl group. A C₂-C₆₀ alkylenegroup used herein refers to a divalent group having the same structureas the C₂-C₆₀ alkyl group.

A C₂-C₆₀ alkynyl group used herein refers to a hydrocarbon group formedby substituting at least one carbon trip bond in the middle or terminalof the C₂-C₆₀ alkyl group, and detailed examples thereof are an ethynylgroup, and a propynyl group. A C₂-C₆₀ alkylene group used herein refersto a divalent group having the same structure as the C₂-C₆₀ alkyl group.

A C₃-C₁₀ cycloalkyl group used herein refers to a monovalent hydrocarbonmonocyclic group having 3 to 10 carbon atoms, and detailed examplesthereof are a cyclopropyl group, a cyclobutyl group, a cyclopentylgroup, a cyclohexyl group, and a cycloheptyl group. A C₃-C₁₀cycloalkylene group used herein refers to a divalent group having thesame structure as the C₃-C₁₀ cycloalkyl group.

A C₁-C₁₀ heterocycloalkyl group used herein refers to a monovalentmonocyclic group having at least one hetero atom selected from N, O, P,and S as a ring-forming atom and 1 to 10 carbon atoms, and detailedexamples thereof are a tetrahydrofuranyl group, and atetrahydrothiophenyl group. A C₁-C₁₀ heterocycloalkylene group usedherein refers to a divalent group having the same structure as theC₁-C₁₀ heterocycloalkyl group.

A C₃-C₁₀ cycloalkenyl group used herein refers to a monovalentmonocyclic group that has 3 to 10 carbon atoms and at least one doublebond in the ring thereof and does not have aromacity, and detailedexamples thereof are a cyclopentenyl group, a cyclohexenyl group, and acycloheptenyl group. A C₃-C₁₀ cycloalkenylene group used herein refersto a divalent group having the same structure as the C₃-C₁₀ cycloalkenylgroup.

A C₁-C₁₀ heterocycloalkenyl group used herein refers to a monovalentmonocyclic group that has at least one hetero atom selected from N, O,P, and S as a ring-forming atom, 1 to 10 carbon atoms, and at least onedouble bond in its ring. Detailed examples of the C₁-C₁₀heterocycloalkenyl group are a 2,3-hydrofuranyl group and a2,3-hydrothiophenyl group. A C₁-C₁₀ heterocycloalkenylene group usedherein refers to a divalent group having the same structure as theC₁-C₁₀ heterocycloalkenyl group.

A C₆-C₆₀ aryl group used herein refers to a monovalent group having acarbocyclic aromatic system having 6 to 60 carbon atoms, and a C₆-C₆₀arylene group used herein refers to a divalent group having acarbocyclic aromatic system having 6 to 60 carbon atoms. Detailedexamples of the C₆-C₆₀ aryl group are a phenyl group, a naphthyl group,an anthracenyl group, a phenanthrenyl group, a pyrenyl group, and achrysenyl group. When the C₆-C₆₀ aryl group and the C₆-C₆₀ arylene groupeach include two or more rings, the rings may be fused to each other.

A C₁-C₆₀ heteroaryl group used herein refers to a monovalent grouphaving a carboncyclic aromatic system that has at least one hetero atomselected from N, O, P, and S as a ring-forming atom, and 1 to 60 carbonatoms. A C₁-C₆₀ heteroarylene group used herein refers to a divalentgroup having a carbocyclic aromatic system that has at least one heteroatom selected from N, O, P, and S as a ring-forming atom, and 1 to 60carbon atoms. Examples of the C₁-C₆₀ heteroaryl group are a pyridinylgroup, a pyrimidinyl group, a pyrazinyl group, a pyridazinyl group, atriazinyl group, a quinolinyl group, and an isoquinolinyl group. Whenthe C₁-C₆₀ heteroaryl group and the C₁-C₆₀ heteroarylene group eachinclude two or more rings, the rings may be fused to each other.

A C₆-C₆₀ aryloxy group used herein indicates -QA₁₀₂ (wherein A₁₀₂ is theC₆-C₆₀ aryl group), and a C₆-C₆₀ arylthio group used herein indicates—SA₁₀₃ (wherein A₁₀₃ is the C₆-C₆₀ aryl group).

A monovalent non-aromatic condensed polycyclic group used herein refersto a monovalent group (for example, having 8 to 60 carbon atoms) thathas two or more rings condensed to each other, only carbon atoms as aring forming atom, and non-aromacity in the entire molecular structure.A detailed example of the monovalent non-aromatic condensed polycyclicgroup is a fluorenyl group. A divalent non-aromatic condensed polycyclicgroup used herein refers to a divalent group having the same structureas the monovalent non-aromatic condensed polycyclic group.

A monovalent non-aromatic condensed heteropolycyclic group used hereinrefers to a momovalent group (for example, having 1 to 60 carbon atoms)that has two or more rings condensed to each other, has a heteroatomselected from N, O P, and S, other than carbon atoms, as a ring formingatom, and has non-aromacity in the entire molecular structure. Anexample of the monovalent non-aromatic condensed heteropolycyclic groupis a carbazolyl group. A divalent non-aromatic condensedheteropolycyclic group used herein refers to a divalent group having thesame structure as the monovalent non-aromatic condensed heteropolycyclicgroup.

at least one substituent selected from substituents of the substitutedC₃-C₁₀ cycloalkylene group, substituted C₁-C₁₀ heterocycloalkylenegroup, substituted C₃-C₁₀ cycloalkenylene group, substituted C₁-C₁₀heterocycloalkenylene group, substituted C₆-C₆₀ arylene group,substituted C₁-C₆₀ heteroarylene group, substituted divalentnon-aromatic condensed polycyclic group, substituted divalentnon-aromatic condensed heteropolycyclic group, substituted C₁-C₆₀ alkylgroup, substituted C₂-C₆₀ alkenyl group, substituted C₂-C₆₀ alkynylgroup, substituted C₁-C₆₀ alkoxy group, substituted C₃-C₁₀ cycloalkylgroup, substituted C₁-C₁₀ heterocycloalkyl group, substituted C₃-C₁₀cycloalkenyl group, substituted C₁-C₁₀ heterocycloalkenyl group,substituted C₆-C₆₀ aryl group, substituted C₆-C₆₀ aryloxy group,substituted C₆-C₆₀ arylthio group, substituted C₁-C₆₀ heteroaryl group,substituted monovalent non-aromatic condensed polycyclic group, andsubstituted monovalent non-aromatic condensed heteropolycyclic group maybe selected from

a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid or a salt thereof, a sulfonic acid or a saltthereof, a phosphoric acid or a salt thereof, a C₁-C₆₀ alkyl group, aC₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and a C₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid group or a salt thereof, a sulfonicacid group or a salt thereof, a phosphoric acid group or a salt thereof,a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic heterocondensed polycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀, heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic heterocondensed polycyclic group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid group or a salt thereof, aphosphoric acid group or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, amonovalent non-aromatic condensed polycyclic group, a monovalentnon-aromatic heterocondensed polycyclic group, —S(Q₂₁)(Q₂₂)(Q₂₃),—B(Q₂₄)(Q₂₅), and —N(Q₂₆)(Q₂₇); and

—Si(Q₃₁)(Q₃₂)(Q₃₃), —B(Q₃₄)(Q₃₅), and —N(Q₃₆)(Q₃₇);

wherein Q₂₁ to Q₂₇, and Q₃₁ to Q₃₇ may be each independently selectedfrom a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, acyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, aC₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₁-C₆₀ heteroarylgroup, a monovalent non-aromatic condensed polycyclic group, and amonovalent non-aromatic condensed heteropolycyclic group.

For example, at least one substituent of the substituted C₃-C₁₀cycloalkylene group, substituted C₁-C₁₀ heterocycloalkylene group,substituted C₃-C₁₀ cycloalkenylene group, substituted C₁-C₁₀heterocycloalkenylene group, substituted C₆-C₆₀ arylene group,substituted C₁-C₆₀ heteroarylene group, substituted divalentnon-aromatic condensed polycyclic group, substituted divalentnon-aromatic condensed heteropolycyclic group, substituted C₁-C₆₀ alkylgroup, substituted C₂-C₆₀ alkenyl group, substituted C₂-C₆₀ alkynylgroup, substituted C₁-C₆₀ alkoxy group, substituted C₃-C₁₀ cycloalkylgroup, substituted C₁-C₁₀ heterocycloalkyl group, substituted C₃-C₁₀cycloalkenyl group, substituted C₁-C₁₀ heterocycloalkenyl group,substituted C₆-C₆₀ aryl group, substituted C₆-C₆₀ aryloxy group,substituted C₆-C₆₀ arylthio group, substituted C₁-C₆₀ heteroaryl group,substituted monovalent non-aromatic condensed polycyclic group, andsubstituted monovalent non-aromatic condensed heteropolycyclic group maybe selected from

a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid or a salt thereof, a sulfonic acid or a saltthereof, a phosphoric acid or a salt thereof, a C₁-C₆₀ alkyl group, aC₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and a C₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid ora salt thereof, a phosphoric acid or a salt thereof, a cyclopentylgroup, a cyclohexyl group, a cycloheptyl group, a cyclopentenyl group, acyclohexenyl group, a phenyl group, a pentalenyl group, an indenylgroup, a naphthyl group, an azulenyl group, a heptalenyl group, anindacenyl group, an acenaphthyl group, a fluorenyl group, aspiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group,a phenalenyl group, a phenanthrenyl group, an anthracenyl group, afluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenylgroup, a naphthacenyl group, a picenyl group, a perylenyl group, apentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenylgroup, a coronenyl group, an ovalenyl group, a pyrrolyl group, athiophenyl group, a furanyl group, an imidazolyl group, a pyrazolylgroup, a thiazolyl group, an isothiazolyl group, an oxazolyl group, anisooxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, an isoindolyl group, an indolyl group, anindazolyl group, a purinyl group, a quinolinyl group, an isoquinolinylgroup, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinylgroup, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, acarbazolyl group, a phenanthridinyl group, an acridinyl group, aphenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, abenzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group,a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, atetrazolyl group, an oxadiazolyl group, a triazinyl group, adibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolylgroup, a dibenzocarbazolyl group, a thiadiazolyl group, animidazopyridinyl group, and an imidazopyrimidinyl group;

a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, acyclopentenyl group, a cyclohexenyl group, a phenyl group, a pentalenylgroup, an indenyl group, a naphthyl group, an azulenyl group, aheptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenylgroup, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, ananthracenyl group, a fluoranthenyl group, a triphenylenyl group, apyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group,a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenylgroup, a rubicenyl group, a coronenyl group, an ovalenyl group, apyrrolyl group, a thiophenyl group, a furanyl group, an imidazolylgroup, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, anoxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinylgroup, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, anindolyl group, an indazolyl group, a purinyl group, a quinolinyl group,an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, anaphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, acinnolinyl group, a carbazolyl group, a phenanthridinyl group, anacridinyl group, a phenanthrolinyl group, a phenazinyl group, abenzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, anisobenzothiazolyl group, a benzoxazolyl group, an isobenzooxazolylgroup, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, atriazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, a thiadiazolyl group,an imidazopyridinyl group, and an imidazopyrimidinyl group;

a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, acyclopentenyl group, a cyclohexenyl group, a phenyl group, a pentalenylgroup, an indenyl group, a naphthyl group, an azulenyl group, aheptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenylgroup, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, ananthracenyl group, a fluoranthenyl group, a triphenylenyl group, apyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group,a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenylgroup, a rubicenyl group, a coronenyl group, an ovalenyl group, apyrrolyl group, a thiophenyl group, a furanyl group, an imidazolylgroup, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, anoxazolyl group, an isooxazolyl group, a pyridinyl group, a pyrazinylgroup, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, anindolyl group, an indazolyl group, a purinyl group, a quinolinyl group,an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, anaphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, acinnolinyl group, a carbazolyl group, a phenanthridinyl group, anacridinyl group, a phenanthrolinyl group, a phenazinyl group, abenzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, anisobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolylgroup, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, atriazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, a thiadiazolyl group,an imidazopyridinyl group, and an imidazopyrimidinyl group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, aC₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a cyclopentyl group, acyclohexyl group, a cycloheptyl group, a cyclopentenyl group, acyclohexenyl group, a phenyl group, a pentalenyl group, an indenylgroup, a naphthyl group, an azulenyl group, a heptalenyl group, anindacenyl group, an acenaphthyl group, a fluorenyl group, aspiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group,a phenalenyl group, a phenanthrenyl group, an anthracenyl group, afluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenylgroup, a naphthacenyl group, a picenyl group, a perylenyl group, apentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenylgroup, a coronenyl group, an ovalenyl group, a pyrrolyl group, athiophenyl group, a furanyl group, an imidazolyl group, a pyrazolylgroup, a thiazolyl group, an isothiazolyl group, an oxazolyl group, anisooxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, an isoindolyl group, an indolyl group, anindazolyl group, a purinyl group, a quinolinyl group, an isoquinolinylgroup, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinylgroup, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, acarbazolyl group, a phenanthridinyl group, an acridinyl group, aphenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, abenzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group,a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, atetrazolyl group, an oxadiazolyl group, a triazinyl group, adibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolylgroup, a dibenzocarbazolyl group, a thiadiazolyl group, animidazopyridinyl group, an imidazopyrimidinyl group, —Si(Q₂₁)(Q₂₂)(Q₂₃),—B(Q₂₄)(Q₂₅), and —N(Q₂₆)(Q₂₇); and

—Si(Q₃₁)(Q₃₂)(Q₃₃), —B(Q₃₄)(Q₃₅), and —N(Q₃₆)(Q₃₇);

Q₂₁ to Q₂₇, Q₃₁ to Q₃₇, and Q₃₁ to Q₃₇ may be each independentlyselected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxylgroup, a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, aC₁-C₆₀ alkoxy group, a cyclopentyl group, a cyclohexyl group, acycloheptyl group, a cyclopentenyl group, a cyclohexenyl group, a phenylgroup, a pentalenyl group, an indenyl group, a naphthyl group, anazulenyl group, a heptalenyl group, an indacenyl group, an acenaphthylgroup, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenylgroup, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenylgroup, an anthracenyl group, a fluoranthenyl group, a triphenylenylgroup, a pyrenyl group, a chrysenyl group, a naphthacenyl group, apicenyl group, a perylenyl group, a pentaphenyl group, a hexacenylgroup, a pentacenyl group, a rubicenyl group, a coronenyl group, anovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group,an imidazolyl group, a pyrazolyl group, a thiazolyl group, anisothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinylgroup, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, anisoindolyl group, an indolyl group, an indazolyl group, a purinyl group,a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, aphthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, aquinazolinyl group, a cinnolinyl group, a carbazolyl group, aphenanthridinyl group, an acridinyl group, a phenanthrolinyl group, aphenazinyl group, a benzoimidazolyl group, a benzofuranyl group, abenzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group,an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, anoxadiazolyl group, a triazinyl group, a dibenzofuranyl group, adibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolylgroup, a thiadiazolyl group, an imidazopyridinyl group, and animidazopyrimidinyl group.

The term “CN” used herein refers to a cyano group, the term “Ph” usedherein refers to a phenyl group, “Me” used herein refers to a methylgroup, the term “Et” used herein refers to an ethyl group, and the term“ter-Bu” or “Bu^(t)” used herein refers to a tert-butyl group.

Hereinafter, an organic light-emitting device according to an embodimentwill be described in detail with reference to Synthesis Examples andExamples. The wording “B was used instead of A” used in describingSynthesis Examples means that a molar equivalent of A was identical to amolar equivalent of B.

The following Examples and Comparative Examples are provided in order tohighlight characteristics of one or more embodiments, but it will beunderstood that the Examples and Comparative Examples are not to beconstrued as limiting the scope of the embodiments, nor are theComparative Examples to be construed as being outside the scope of theembodiments. Further, it will be understood that the embodiments are notlimited to the particular details described in the Examples andComparative Examples.

EXAMPLE Synthesis Example 1: Synthesis of Compound 1

Synthesis of Intermediate I-1

2,3-dihydroxynaphthalene (8.0 g, 50 mmol) and a methansulfonic acid(16.2 mL, 250 mmol) were dissolved in o-xylene (200 mL), and then theresult was stirred at a temperature of 130° C. for 24 hours. Thereaction solution was cooled to ambient temperature, and then, a sodiumbicarbonate aqueous solution was added thereto. An extraction processwas performed thereon three times with 60 mL of chloroform. An obtainedorganic layer was dried using magnesium sulfate, and a solvent wasremoved therefrom by evaporation. The residual was separation-purifiedby silica gel column chromatography to obtain 2.35 g (yield of 33%) ofIntermediate I-1. The obtained compound was confirmed by LC-MS.C₂₀H₁₂O₂: M+1 285.1

Synthesis of Intermediate I-2

2.35 g (8.3 mmol) of Intermediate I-1 was dissolved in 20 mL of tolueneand 20 mL of 30% potassium phosphate, and then, at a temperature of 0°C., 2.82 g (10.0 mmol) of trifluoromethansulfonic acid anhydride wasslowly added dropwise thereto. The reaction solution was heated toambient temperature, and then stirred for 3 hours. Then, 30 mL of waterwas added thereto, and an extraction process was performed thereon threetimes by using 30 mL of ethyl ether. An obtained organic layer was driedusing magnesium sulfate, and a solvent was removed therefrom byevaporation. The residual was separation-purified by silica gel columnchromatography to obtain 2.80 g (yield of 81%) of Intermediate I-2. Theobtained compound was confirmed by LC-MS. C₂₁H₁₁F₃O₄S: M+1 417.0

Synthesis of Intermediate I-3

2.80 g (6.72 mmol) of Intermediate I-2, 1.71 g (6.72 mmol) ofbis(pinacolato)diborane, 0.24 g (0.34 mmol) of[1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium (II)(hereinafter referred to as PdCl₂(dppf)₂), and 1.98 g (20.2 mmol) ofKOAc were dissolved in 40 ml of DMSO. Then, the result was stirred at atemperature of 80° C. for 6 hours. When the reaction solution was cooledto ambient temperature, the reaction solution was extracted three timeswith 40 ml of water and 40 ml of diethyl ether. An obtained organiclayer was dried by using magnesium sulfate, and then a solvent wasremoved therefrom by evaporation. The residual was separation-purifiedby silica gel column chromatography to obtain 1.99 g (yield of 75%) ofIntermediate I-3. The obtained compound was confirmed by LC-MS.C₂₆H₂₃BO₃: M+1 395.2

Synthesis of Compound 1

1.99 g (5.05 mmol) of Intermediate I-3, 1.57 g (5.05 mmol) of2-bromo-4,6-diphenyl pyrimidine, 0.29 g (0.25 mmol) of Pd(PPh₃)₄, and2.10 g (15.2 mmol) of K₂CO₃ were dissolved 60 mL of in a THF/H₂O (avolumetric ratio of 2/1) mixed solution. Then, at a temperature of 80°C., the resultant solution was stirred for 12 hours. The reactionsolution was cooled to ambient temperature, and then, extracted threetimes by using 30 mL of water and 30 mL of ethyl acetate. An obtainedorganic layer was dried by using magnesium sulfate, and then a solventwas removed therefrom by evaporation. The residual wasseparation-purified by silica gel column chromatography to obtain 1.91 g(yield of 76%) of Compound 1. The obtained compound was identified byMS/FAB and ¹H NMR. C₃₆H₂₂N₂O cal. 498.17. found 498.18.

Synthesis Example 2: Synthesis of Compound 2

1.84 g (yield of 73%) of Compound 2 was obtained in the same manner asin Synthesis Example 1, except that in synthesizing Compound 1,chloro-1,3,5-triazine was used instead of 2-bromo-4,6-diphenylpyrimidine. The obtained compound was identified by MS/FAB and ¹H NMR.C₃₅H₂₁N₃O cal. 499.17. found 499.19.

Synthesis Example 3: Synthesis of Compound 9

Synthesis of Intermediate I-4

5.02 g (30 mmol) of 9H-carbazole, 4.71 g (30 mmol) of bromobenzene, 1.14g (18 mmol) of copper powder, and 6.22 g (45 mmol) of K₂CO₃ weredissolved in 80 mL of o-dichlorobenzene. Then, the result was stirred ata temperature of 180° C. for 24 hours. The reaction solution was cooledto ambient temperature, 60 mL of water was added thereto, and then anextraction process was performed thereon three times by using 50 mL ofethyl acetate. An obtained organic layer was dried by using magnesiumsulfate, and the residual obtained by evaporating a solvent therefromwas separation-purified by silica gel column chromatography to obtain5.47 g (yield of 75%) of Intermediate I-4. The obtained compound wasconfirmed by LC-MS. C₁₈H₁₃N: M+1 244.1

Synthesis of Intermediate I-5

5.47 g (22.5 mmol) of Intermediate I-4 was completely dissolved in 80 mLof CH₂Cl₂, and then, 4.00 g (22.5 mmol) of N-bromosuccinimide was addedthereto, and the resultant solution was stirred at ambient temperaturefor 12 hours. 60 mL of water was added to the reaction solution and thenan extraction was performed thereon three times by using 50 mL ofCH₂Cl₂. An obtained organic layer was dried by using magnesium sulfate,and then, a solvent was evaporated therefrom. Then, recrystallization ofthe resultant solution was performed by using methanol to obtain 6.16 g(yield of 85%) of Intermediate I-5. The obtained compound was confirmedby LC-MS. C₁₈H₁₂BrN: M+1 322.0

Synthesis of Intermediate I-6

6.16 g (19.1 mmol) of Intermediate I-5 and 2.57 g (28.7 mmol) of CuCNwere dissolved in 70 mL of DMF, and then, the result was stirred at atemperature of 150° C. for 24 hours. The reaction solution was cooled toambient temperature, and then, 60 mL of ammonia water and 60 mL of waterwere added thereto. An extraction process was performed thereon threetimes by using 50 mL of CH₂Cl₂. An obtained organic layer was dried byusing magnesium sulfate, and the residual obtained by evaporating asolvent therefrom was separation-purified by silica gel columnchromatography to obtain 4.71 g (yield of 92%) of Intermediate I-6. Theobtained compound was confirmed by LC-MS. C₁₉H₁₂N₂: M+1 269.1

Synthesis of Intermediate I-7

4.71 g (17.6 mmol) of Intermediate I-6 was completely dissolved in 80 mLof CH₂Cl₂, and then, 3.13 g (17.6 mmol) of N-bromosuccinimide was addedthereto, and the resultant solution was stirred at room temperature for8 hours. 60 mL of water was added to the reaction solution and then anextraction was performed thereon three times by using 50 mL of CH₂Cl₂.An organic layer was dried by using magnesium sulfate, and then, asolvent was evaporated therefrom, and then, recrystallization of theresultant solution was performed by using methanol to obtain 5.81 g(yield 95%) of Intermediate I-7. The obtained compound was confirmed byLC-MS. C₁₉H₁₁BrN₂: M+1 347.0

Synthesis of Intermediate I-8

5.81 g (16.7 mmol) of Intermediate I-7, 0.68 g (0.84 mmol) ofPd(dppf)₂Cl₂, and 4.92 g (50.1 mmol) of KOAc were dissolved in 80 mL ofDMSO, and then the resultant solution was stirred at a temperature of150° C. for 24 hours. The reaction solution was cooled to ambienttemperature, and 100 mL of water was added thereto. Then, the resultantreaction solution was extracted three times by using 50 mL of CH₂Cl₂. Anobtained organic layer was dried by using magnesium sulfate, and theresidue obtained by evaporating a solvent therefrom wasseparation-purified by silica gel column chromatography to obtain 4.61 g(yield of 70%) of Intermediate I-8. The obtained compound was confirmedby LC-MS. C₂₅H₂₃BN₂O₂: M+1 395.2

Synthesis of Compound 9

1.84 g (yield of 73%) of Compound 9 was obtained in the same manner asin Synthesis Example 1, except that in synthesizing Compound 1,Intermediate I-2 was used instead of Intermediate I-3, and IntermediateI-8 was used instead of 2-bromo-4,6-diphenyl Pyrimidine. The obtainedcompound was identified by MS/FAB and ¹H NMR. C₃₉H₂₂N₂O cal. 534.17.found 534.16.

Synthesis Example 4: Synthesis of Compound 25

Synthesis of Intermediate I-9

2.07 g (10 mmol) of 1-bromonaphthalene was dissolved in 30 mL of THF.Then, at a temperature of −78° C., 4 mL (2.5M in hexane) ofn-butyllithium was added thereto. 1 hour after the addition, at the sametemperature, 2.0 mL (10 mmol) of2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane was added thereto.The result was stirred at ambient temperature for 5 hours, water wasadded thereto, and washed three times with diethyl ether (30 mL). Thewashed diethyl ether layer was dried by using MgSO₄ and then evaporatedunder reduced pressure to obtain a product, which was thenseparation-purified by silica gel column chromatography to obtain 1.96 g(yield of 77%) of Intermediate I-9. The obtained compound was confirmedby LC-MS. C₁₆H₁₉BO₂: M+1 255.2

Synthesis of Intermediate I-10

2.54 g (10.0 mmol) of Intermediate I-9, 2.02 g (10.0 mmol) of1-bromo-2-nitrobenzene, 0.58 g (0.50 mmol) of Pd(PPh₃)₄, 0.16 g (0.5mmol) of tetrabutylammonium bromide (TBAB), and 3.18 g (30.0 mmol) ofNa₂CO₃ were dissolved in 60 mL of a toluene/ethanol/H₂O (3/3/1) mixedsolution, and then, the mixture was stirred at a temperature of 80° C.for 16 hours. The reaction solution was cooled to ambient temperature,and then, an extraction process was performed thereon three times byusing 60 mL of water and 60 mL of diethyl ether. An organic layerobtained therefrom was dried by using magnesium sulfate and the residualobtained by evaporating a solvent therefrom was separation-purified bysilica gel column chromatography to obtain 2.04 g (yield: 82%) ofIntermediate I-10. The obtained compound was confirmed by LC-MS.C₁₆H₁₁NO₂: M+1 250.1

Synthesis of Intermediate I-11

2.49 g (10.0 mmol) of Intermediate I-10, 3.56 g (30 mmol) of tin, and 5mL (50 mmol, conc. 36.5%) of a hydrochloric acid were dissolved in 60 mLof ethanol, and then the result was stirred at a temperature of 100° C.for 8 hours. The reaction solution was cooled to ambient temperature,and 3 g of sodium hydroxide dissolved in 10 mL of water was added to afiltrate obtained by performing filtration under reduced pressure, andan extraction process was performed thereon three times by using 60 mLof water and 60 mL of dichloromethane. An organic layer obtainedtherefrom was dried by using magnesium sulfate and the residue obtainedby evaporating a solvent therefrom was separation-purified by silica gelcolumn chromatography to obtain 1.97 g (yield: 90%) of IntermediateI-11. The obtained compound was confirmed by LC-MS. C₁₆H₁₃N: M+1 220.1

Synthesis of Intermediate I-12

2.19 g (10 mmol) of Intermediate I-11 and 3.66 g (20 mmol) of3-bromobenzaldehyde were dissolved in 10 mL of a trifluoroacetic acid,and then the result was stirred in a seal tube at a temperature of 130°C. for 3 days. The reaction solution was cooled to ambient temperature,and then subjected to quenching using NaHCO₃, and then an extractionprocess was performed thereon three times by using 60 mL of water and 60mL of dichloromethane. An organic layer obtained therefrom was dried byusing magnesium sulfate and the residue obtained by evaporating asolvent therefrom was separation-purified by silica gel columnchromatography to obtain 1.92 g (yield: 50%) of Intermediate I-12. Theobtained compound was confirmed by LC-MS. C₂₃H₁₄BrN: M+1 384.0

Synthesis of Intermediate I-13

3.15 g (yield of 73%) of Intermediate I-13 was obtained in the samemanner as used to synthesize Intermediate I-9, except that insynthesizing Intermediate I-9, Intermediate I-12 was used instead of1-bromonaphthalene. The obtained compound was confirmed by LC-MS.C₂₉H₂₆BNO₂: M+1 432.2

Synthesis of Compound 25

2.25 g (yield of 78%) of Compound 25 was obtained in the same manner asused to synthesize Compound 9, except that Intermediate I-13 was usedinstead of Intermediate I-8. The obtained compound was identified byMS/FAB and ¹H NMR. C₄₃H₂₅NO cal. 571.19. found 571.20.

Synthesis Example 5: Synthesis of Compound 60

Synthesis of Intermediate I-14

2.36 g (10 mmol) of 1,3-dibromobenzene was dissolved in 30 mL of THF,and then, at a temperature of −78° C., 4 mL (2.5M in hexane) ofn-butyllithium was added thereto. 1 hour after the addition, 2.20 g (10mmol) of chlorodiphenylphosphine was slowly added dropwise thereto.Then, the result was stirred for 3 hours, the temperature was raised toambient temperature, and water was added thereto. The result solutionwas washed three times with ethyl acetate (30 mL). The obtained ethylacetate layer was dried by using MgSO₄, and then separation-purified bysilica gel column chromatography to obtain 2.73 g (yield of 80%) ofIntermediate I-14. The obtained compound was confirmed by LC-MS.C₁₈H₁₄BrP: M+1 341.0

Synthesis of Intermediate I-15

2.06 g (yield of 53%) of Intermediate I-15 was obtained in the samemanner as used to synthesize Intermediate I-9, except that insynthesizing Intermediate I-9, Intermediate I-14 was used instead of1-bromonaphthalene. The obtained compound was confirmed by LC-MS.C₂₄H₂₆BO₂P: M+1 389.2

Synthesis of Intermediate I-16

2.47 g (yield of 53%) of Intermediate I-16 was obtained in the samemanner as used to synthesize Compound 1, except that in synthesizingCompound 1, Intermediate I-15 was used instead of Intermediate I-3 and1,4-dibromonaphthalene was used instead of 2-bromo-4,6-diphenylpyrimidine. The obtained compound was confirmed by LC-MS. C₂₈H₂₀BrP: M+1467.1

Synthesis of Intermediate I-17

2.65 g (yield of 80%) of Intermediate I-17 was obtained in the samemanner as used to synthesize Compound 1, except that in synthesizingCompound 1, Intermediate I-16 was used instead of 2-bromo-4,6-diphenylpyrimidine. The obtained compound was confirmed by LC-MS. C₄₈H₃₁OP: M+1655.2

Synthesis of Compound 60

2.65 g (4.05 mmol) of Intermediate I-17 was dissolved in 25 mL ofdichloromethane, and then, 2 mL of hydrogen peroxide was added thereto,and the result was stirred at ambient temperature for 20 hours. 20 mL ofwater was added thereto, and an extraction process was performed thereonthree times by using 20 mL of dichloromethane. An obtained organic layerwas dried using magnesium sulfate and a solvent was removed therefrom byevaporation. The residue was separation-purified by silica gel columnchromatography to obtain 2.04 g (yield of 75%) of Intermediate I-60. Theobtained compound was identified by MS/FAB and ¹H NMR. C₄₈H₃₁O₂P cal.670.21. found 670.20.

Synthesis Example 6: Synthesis of Compound 72

2.36 g (yield of 82%) of Compound 72 was obtained in the same manner asused to synthesize Compound 1, except that in synthesizing Compound 1,Intermediate I-18 was used instead of 2-bromo-4,6-diphenyl pyrimidine.The obtained compound was identified by MS/FAB and ¹H NMR. C₄₄H₂₆O cal.570.20. found 570.19.

Additional compounds were synthesized by appropriate intermediatematerials by using the same synthesis method as described above, and ¹HNMR and MS/FAB results of the synthetic compounds are shown in Table 1below.

Methods of synthesizing compounds other than the compound shown in Table1 may be understood by referring to the synthesis path and sourcematerials described above.

TABLE 1 MS/FAB Compound ¹H NMR (CDC1₃, 400 MHz) found calc. 1 □□□δ =9.03-9.02 (m, 1H), 8.88-8.86 (dd, 1H), 8.40 (s, 1H), 8.32- 498.18 498.178.30 (m, 4H), 8.19-8.17 (m, 1H), 8.10-8.06 (m, 2H), 7.98 (s, 1H),7.97-7.95 (m, 1H), 7.84-7.80 (m, 1H), 7.62-7.49 (m, 6H), 7.43-7.39 (m,1H), 7.31-7.26 (m, 2H) 2 □□□δ = 9.11-9.10 (m, 1H), 8.89-8.86 (m, 1H),8.73-8.71 (m, 4H), 499.19 499.17 8.49 (s, 1H), 8.20-8.18 (m, 1H),8.10-8.07 (m, 2H), 7.97-7.95 (m, 1H), 7.84-7.80 (m, 1H), 7.62-7.51 (m,6H), 7.44-7.40 (m, 3H) 6 □□□δ = 8.80-8.78 (m, 1H), 8.76-8.74 (m, 1H),8.48-8.55 (m, 1H), 421.16 421.15 8.53-8.52 (m, 1H), 8.21-8.20 (m, 2H),8.08-8.06 (m, 2H), 8.02-7.95 (m, 3H), 7.84-7.77 (m, 2H), 7.71-7.68 (m,1H), 7.62-7.58 (m, 2H), 7.46-7.39 (m, 3H) 9 □□□δ = 8.76-8.74 (m, 1H),8.67-8.66 (m, 1H), 8.52-8.51 (m, 1H), 534.16 534.17 8.46-8.45 (m, 1H),8.31-8.30 (m, 1H), 8.08-8.05 (m, 2H), 7.99-7.94 (m, 2H), 7.85-7.78 (m,3H), 7.71-7.69 (dd, 1H), 7.62-7.58 (m, 1H), 7.53-7.41 (m, 6H), 7.32-7.26(m, 2H) 11 □□□δ = 8.76-8.73 (m, 1H), 8.58-8.57 (m, 1H), 8.51-8.50 (m,1H), 649.18 649.17 8.31-8.28 (m, 2H), 8.08-8.05 (m, 2H), 8.01-7.93 (m,6H), 7.89-7.80 (m, 1H), 7.85-7.80 (m, 2H), 7.62-7.57 (m, 2H), 7.54-7.40(m, 8H), 7.34-7.27 (m, 1H) 17 □□□δ = 8.78-8.76 (m, 1H), 8.60-8.59 (m,1H), 8.54-8.53 (m, 1H), 485.20 485.18 8.26-8.18 (m, 2H), 8.08-8.06 (m,2H), 7.98-7.96 (m, 2H), 7.86-7.84 (m, 1H), 7.72-7.61 (m, 3H), 7.47-7.40(m, 2H), 7.16-7.13 (m, 2H), 1.32 (s, 6H) 22 □□□δ = 8.86-8.85 (m, 1H),8.80-8.78 (m, 1H), 8.68-8.66 (m, 1H), 571.18 571.19 8.52-8.49 (m, 2H),8.45-8.44 (m, 1H), 8.27-8.26 (m, 1H), 8.11-8.06 (m, 2H), 8.01-7.92 (m,5H), 7.85-7.80 (m, 2H), 7.74-7.70 (m, 2H), 7.67-7.58 (m, 4H), 7.47-7.39(m, 3H) 25 □□□δ = 8.78-8.72 (m, 2H), 8.63-8.61 (m, 1H), 8.55-8.51 (m,2H), 571.20 571.19 8.47-8.44 (m, 1H), 8.32-8.31 (m, 1H), 8.28-8.26 (m,1H), 8.08-8.05 (m, 2H), 7.99-7.91 (m, 3H), 7.87-7.79 (m, 4H), 7.72-7.65(m, 2H), 7.62-7.58 (m, 1H), 7.49-7.39 (m, 5H) 30 □□□δ = 8.76-8.74 (m,1H), 8.50-8.49 (m, 1H), 8.24-8.21 (m, 5H), 573.20 573.21 8.15 (s, 2H),8.08-8.05 (m, 2H), 8.01-7.95 (m, 4H), 7.88-7.80 (m, 3H), 7.62-7.58 (m,1H), 7.47-7.39 (m, 6H), 7.33-7.31 (m, 2H) 38 □□□δ = 8.77-8.75 (m, 1H),8.49-8.48 (m, 1H), 8.24-8.20 (m, 2H), 785.26 785.25 8.09-8.04 (m, 4H),8.02-8.00 (m, 1H), 7.97-7.94 (m, 2H), 7.84-7.78 (m, 3H), 7.70-7.58 (m,7H), 7.52-7.39 (m, 14H), 7.34-7.27 (m, 1H) 47 □□□δ = 8.84-8.82 (m, 1H),8.79 (d, 1H), 8.70-8.69 (m, 1H), 8.51- 527.12 527.13 8.50 (m, 1H),8.39-8.38 (m, 1H), 8.14-8.04 (m, 5H), 7.97-7.90 (m, 3H), 7.84-7.75 (m,3H), 7.62-7.40 (m, 5H) 51 □□□δ = 8.84-8.82 (m, 2H), 8.76-8.74 (m, 1H),8.67-8.65 (dd, 2H), 675.24 675.23 8.54-8.53 (m, 1H), 8.51-8.48 (m, 2H),8.26-8.12 (m, 7H), 8.08-8.05 (m, 2H), 8.01-7.95 (m, 4H), 7.84-7.80 (m,1H), 7.69-7.64 (m, 2H), 7.62-7.58 (m, 3H), 7.47-7.39 (m, 2H) 54 □□□δ =8.83-8.81 (m, 1H), 8.58 (d, 1H), 8.51-8.50 (m, 1H), 8.48- 598.19 598.208.47 (dd, 1H), 8.39-8.36 (m, 1H), 8.32 (s, 1H), 8.29-8.27 (m, 1H),8.11-8.06 (m, 2H), 8.02-7.95 (m, 3H), 7.90-7.86 (m, 1H), 7.84-7.77 (m,4H), 7.70-7.66 (m, 2H), 7.63-7.39 (m, 6H), 7.30-7.25 (m, 1H) 60 □□□δ =8.83-8.81 (dd, 1H), 8.51-8.50 (m, 1H), 8.32-8.31 (m, 1H), 670.22 670.218.11-8.01 (m, 3H), 7.97-7.95 (m, 2H), 7.84-7.80 (m, 1H), 7.68-7.40 (m,20H), 7.09-7.05 (m, 2H) 64 □□□δ = 8.78-8.76 (m, 1H), 8.54-8.53 (m, 1H),8.47-8.46 (m, 1H), 660.21 660.22 8.36-8.35 (m, 1H), 8.32-8.31 (m, 1H),8.21-8.19 (m, 2H), 8.08-8.06 (m, 3H), 8.01-7.91 (m, 5H), 7.84-7.80 (m,2H), 7.71-7.69 (dd, 1H), 7.63-7.58 (m, 2H), 7.53-7.40 (m, 6H), 7.34-7.24(m, 2H) 66 □□□δ = 8.82-8.80 (m, 1H), 8.52-8.51 (m, 1H), 8.43-8.42 (m,1H), 674.25 674.24 8.35-8.32 (m, 4H), 8.28-8.26 (dd, 2H), 8.14-8.13 (m,1H), 8.08-8.05 (m, 1H), 8.00-7.94 (m, 5H), 7.85-7.80 (m, 1H), 7.66-7.40(m, 11H), 7.31-7.26 (m, 2H) 72 □□□δ = 8.81-8.79 (m, 1H), 8.50-8.49 (m,1H), 8.42-8.41 (m, 1H), 570.19 570.20 8.14(s, 1H), 8.08-8.06 (m, 1H),8.00-7.95 (m, 2H), 7.91-7.80 (m, 6H), 7.74-7.40 (m, 2H), 7.66-7.58 (m,2H), 7.54-7.49 (m, 2H), 7.47- 7.30 (m, 6H), 7.05-7.00 (m, 1H) 84 □□□δ =8.82-8.80 (m, 1H), 8.51-8.50 (m, 1H), 8.47-8.46 (m, 1H), 710.25 710.248.43-8.42 (m, 1H), 8.41-8.40 (m, 1H), 8.14 (s, 1H), 8.08-8.06 (m, 1H),8.00-7.96 (m, 4H), 7.92-7.81 (m, 4H), 7.71-7.69 (dd, 1H), 7.62- 7.58 (m,2H), 7.52-7.35 (m, 8H), 7.34-7.26 (m, 4H) 89 □□□δ = 8.81-8.79 (m, 1H),8.51-8.50 (m, 1H), 8.43-8.42 (m, 1H), 720.22 720.22 8.15-8.14 (m, 1H),8.09-8.06 (m, 1H), 8.01-7.89 (m, 8H), 7.84-7.80 (m, 1H), 7.70-7.58 (m,7H), 7.53-7.39 (m, 8H), 7.37-7.29 (m, 4H) 96 □□□δ = 8.81-8.79 (m, 1H),8.52-8.51 (m, 1H), 8.43-8.42 (m, 1H), 660.17 660.18 8.36-8.35 (m, 1H),8.15-8.14 (m, 1H), 8.08-8.02 (m, 3H), 8.00-7.81 (m, 8H), 7.68-7.65 (m,1H), 7.63-7.56 (m, 3H), 7.54-7.50 (m, 2H), 7.47-7.35(m, 4H), 7.33-7.29(m, 2H)

Example 1

An ITO glass substrate (a product of Corning Co., Ltd) with an ITO layerhaving a resistance and thickness of 15 Ω/cm²/1,200 Å thereon was cut toa size of 50 mm×50 mm×0.7 mm, and then, sonicated by using isopropylalcohol and pure water each for 5 minutes, and cleaned by the exposureto ultraviolet rays for 30 minutes, and then ozone, and the ITO glasssubstrate was mounted on a vacuum deposition apparatus.

2-TNATA was deposited on the ITO glass substrate to form a holeinjection layer having a thickness of 600 Å, NPB was deposited on thehole injection layer to form a hole transport layer having a thicknessof 300 Å, and then ADN (host) and DPAVBi (dopant) were co-deposited at aweight ratio of 98:2 on the hole transport layer to form an emissionlayer having a thickness of 300 Å.

Thereafter, Compound 1 was deposited on the emission layer to form anelectron transport layer having a thickness of 300 Å, LiF was depositedon the electron transport layer to form an electron injection layerhaving a thickness of 10 Å, and Al was deposited on the electroninjection layer to form a cathode having a thickness of 3,000 Å, therebycompleting the manufacture of an organic light-emitting device.

Example 2

An organic light-emitting device was manufactured in the same manner asin Example 1, except that in forming an electron transport layer,Compound 2 was used instead of Compound 1.

Example 3

An organic light-emitting device was manufactured in the same manner asin Example 1, except that in forming the electron transport layer,Compound 9 was used instead of Compound 1.

Example 4

An organic light-emitting device was manufactured in the same manner asin Example 1, except that in forming the electron transport layer,Compound 25 was used instead of Compound 1.

Example 5

An organic light-emitting device was manufactured in the same manner asin Example 1, except that in forming the electron transport layer,Compound 38 was used instead of Compound 1.

Example 6

An organic light-emitting device was manufactured in the same manner asin Example 1, except that in forming an electron transport layer,Compound 60 was used instead of Compound 1.

Example 7

An organic light-emitting device was manufactured in the same manner asin Example 1, except that in forming an electron transport layer,Compound 72 was used instead of Compound 1.

Example 8

An organic light-emitting device was manufactured in the same manner asin Example 1, except that in forming an electron transport layer,Compound 84 was used instead of Compound 1.

Example 9

An organic light-emitting device was manufactured in the same manner asin Example 1, except that in forming an electron transport layer,Compound 96 was used instead of Compound 1.

Comparative Example 1

An organic light-emitting device was manufactured in the same manner asin Example 1, except that in forming an electron transport layer,Compound 200 was used instead of Compound 1.

Comparative Example 2

An organic light-emitting device was manufactured in the same manner asin Example 1, except that in forming an electron transport layer,Compound A was used instead of Compound 1.

Comparative Example 3

An organic light-emitting device was manufactured in the same manner asin Example 1, except that in forming an electron transport layer,Compound B was used instead of Compound 1.

Evaluation Example 1

The driving voltage, current density, brightness, efficiency, andhalf-lifespan of the organic light-emitting devices manufacturedaccording to Examples 1 to 9 and Comparative Examples 1 to 3 weremeasured by using Kethley SMU 236 and a brightness photometer PR650, andresults thereof are shown in Table 2. The half-lifespan is a period oftime that is taken until the brightness of the organic light-emittingdevice was 50% of initial brightness.

TABLE 2 Driving Current Half lifespan Electron voltage DensityBrightness Efficiency Emission (hr transport layer (V) (mA/cm²) (cd/m²)(cd/A) color @100 mA/cm²) Example 1 Compound 1 4.37 50 4,175 8.35 Blue602 Example 2 Compound 2 4.56 50 3,875 7.75 Blue 583 Example 3 Compound9 4.46 50 4,005 8.01 Blue 576 Example 4 Compound 25 4.11 50 4,290 8.58Blue 552 Example 5 Compound 38 4.05 50 4,130 8.26 Blue 635 Example 6Compound 60 4.61 50 3,815 7.63 Blue 625 Example 7 Compound 72 4.00 504,000 8.00 Blue 617 Example 8 Compound 84 4.28 50 3,980 7.96 Blue 605Example 9 Compound 96 4.15 50 4,080 8.16 Blue 592 Comparative Compound5.12 50 3,290 6.58 Blue 317 Example 1 200 Comparative Compound A 5.34 503,170 6.34 Blue 298 Example 2 Comparative Compound B 5.54 50 3,380 6.76Blue 323 Example 3

From Table 2, it may be seen that the organic light-emitting devicesmanufactured according to Examples 1 to 9 exhibited improved drivingvoltage, brightness, efficiency, and half-lifespan, compared with theorganic light-emitting devices manufactured according to ComparativeExamples 1 to 3.

An organic light-emitting device including the compound according to anembodiment may have a low driving voltage, high efficiency, highbrightness, and long lifespan.

Example embodiments have been disclosed herein, and although specificterms are employed, they are used and are to be interpreted in a genericand descriptive sense only and not for purpose of limitation. In someinstances, as would be apparent to one of ordinary skill in the art asof the filing of the present application, features, characteristics,and/or elements described in connection with a particular embodiment maybe used singly or in combination with features, characteristics, and/orelements described in connection with other embodiments unless otherwisespecifically indicated. Accordingly, it will be understood by those ofskill in the art that various changes in form and details may be madewithout departing from the spirit and scope of the present invention asset forth in the following claims.

What is claimed is:
 1. A condensed cyclic compound represented by Formula 1 below:

wherein in Formula 1, L₁ is selected from a substituted or unsubstituted C₃-C₁₀ cycloalkylene group, a substituted or unsubstituted C₁-C₁₀ heterocycloalkylene group, a substituted or unsubstituted C₃-C₁₀ cycloalkenylene group, a substituted or unsubstituted C₁-C₁₀ heterocycloalkenylene group, a substituted or unsubstituted C₆-C₆₀ arylene group, a substituted or unsubstituted C₁-C₆₀ heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group; a1 is an integer selected from 0, 1, 2, and 3, and when a1 is 2 or more, a plurality of L₁ are identical or different; A₁ is selected from a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, —P(═O)(R₂₁)(R₂₂), —P(═S)(R₂₃)(R₂₄), —S(═O)(R₂₅)(R₂₆), —S(═O)₂(R₂₇), a substituted or unsubstituted C₁-C₆₀ alkyl group, a substituted or unsubstituted C₂-C₆₀ alkenyl group, a substituted or unsubstituted C₂-C₆₀ alkynyl group, a substituted or unsubstituted C₃-C₁₀ cycloalkyl group, a substituted or unsubstituted C₁-C₁₀ heterocycloalkyl group, a substituted or unsubstituted C₃-C₁₀ cycloalkenyl group, a substituted or unsubstituted C₁-C₁₀ heterocycloalkenyl group, a substituted or unsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₆-C₆₀ aryloxy group, a substituted or unsubstituted C₆-C₆₀ arylthio group, a substituted or unsubstituted C₁-C₆₀ heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, —Si(Q₁)(Q₂)(Q₃), —B(Q₄)(Q₅), and —N(Q₆)(Q₇); b1 is an integer selected from 1, 2, 3, and 4, and when b1 is 2 or more, a plurality of A₁ are identical or different; R₁ to R₁₁ are each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, —P(═O)(R₃₁)(R₃₂), —P(═S)(R₃₃)(R₃₄), —S(═O)(R₃₅)(R₃₆), —S(═O)₂(R₃₇), a substituted or unsubstituted C₁-C₆₀ alkyl group, a substituted or unsubstituted C₂-C₆₀ alkenyl group, a substituted or unsubstituted C₂-C₆₀ alkynyl group, a substituted or unsubstituted C₁-C₆₀ alkoxy group, a substituted or unsubstituted C₃-C₁₀ cycloalkyl group, a substituted or unsubstituted C₁-C₁₀ heterocycloalkyl group, a substituted or unsubstituted C₃-C₁₀ cycloalkenyl group, a substituted or unsubstituted C₁-C₁₀ heterocycloalkenyl group, a substituted or unsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₆-C₆₀ aryloxy group, a substituted or unsubstituted C₆-C₆₀ arylthiogroup, a substituted or unsubstituted C₁-C₀ heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, —Si(Q₁₁)(Q₁₂)(Q₁₃), —B(Q₁₄)(Q₁₅), and —N(Q₁₆)(Q₁₇); R₂₁ to R₂₇ and R₃₁ to R₃₇ are each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a substituted or unsubstituted C₁-C₆₀ alkyl group, a substituted or unsubstituted C₂-C₆₀ alkenyl group, a substituted or unsubstituted C₂-C₆₀ alkynyl group, a substituted or unsubstituted C₁-C₆₀ alkoxy group, a substituted or unsubstituted C₃-C₁₀ cycloalkyl group, a substituted or unsubstituted C₁-C₁₀ heterocycloalkyl group, a substituted or unsubstituted C₃-C₁₀ cycloalkenyl group, a substituted or unsubstituted C₁-C₁₀ heterocycloalkenyl group, a substituted or unsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₁-C₆₀ heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group; at least one substituent of the substituted C₃-C₁₀ cycloalkylene group, substituted C₁-C₁₀ heterocycloalkylene group, substituted C₃-C₁₀ cycloalkenylene group, substituted C₁-C₁₀ heterocycloalkenylene group, substituted C₆-C₆₀ arylene group, substituted C₁-C₁₀ heteroarylene group, substituted divalent non-aromatic condensed polycyclic group, substituted divalent non-aromatic condensed heteropolycyclic group, substituted C₁-C₆₀ alkyl group, substituted C₂-C₆₀ alkenyl group, substituted C₂-C₆₀ alkynyl group, substituted C₃-C₁₀ cycloalkyl group, substituted C₁-C₁₀ heterocycloalkyl group, substituted C₃-C₁₀ cycloalkenyl group, substituted C₁-C₁₀ heterocycloalkenyl group, substituted C₆-C₆₀ aryl group, substituted C₆-C₆₀ aryloxy group, substituted C₆-C₆₀ arylthio group, substituted C₁-C₆₀ heteroaryl group, substituted monovalent non-aromatic condensed polycyclic group, and substituted monovalent non-aromatic condensed heteropolycyclic group is selected from: a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and a C₁-C₆₀ alkoxy group; a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and a C₁-C₆₀ alkoxy group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group; a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group; a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, —Si(Q₂₁)(Q₂₂)(Q₂₃), —B(Q₂₄)(Q₂₅) and —N(Q₂₆)(Q₂₇); and —Si(Q₃₁)(Q₃₂)(Q₃₃), —B(Q₃₄)(Q₃₅), and —N(Q₃₆)(Q₃₇); wherein Q₁ to Q₇, Q₁₁ to Q₁₇, Q₂₁ to Q₂₇, and Q₃₁ to Q₃₇ are each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₁-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group.
 2. The condensed cyclic compound as claimed in claim 1, wherein L₁ in Formula 1 is selected from: a phenylene group, a pentalenylene group, an indenylene group, a naphthylene group, an azulenylene group, a heptalenylene group, an indacenylene group, an acenaphthylene group, a fluorenylene group, a spiro-fluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenalenylene group, a phenanthrenylene group, an anthracenylene group, a fluoranthenylene group, a triphenylenylene group, a pyrenylene group, a chrysenylene group, a naphthacenylene group, a picenylene group, a perylenylene group, a pentaphenylene group, a hexacenylene group, a pentacenylene group, a rubicenylene group, a coronenylene group, an ovalenylene group, a pyrrolylene group, a thiophenylene group, a furanylene group, an imidazolylene group, a pyrazolylene group, a thiazolylene group, an isothiazolylene group, an oxazolylene group, a isoxazolylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, an isoindolylene group, an indolylene group, an indazolylene group, a purinylene group, a quinolinylene group, an isoquinolinylene group, a benzoquinolinylene group, a phthalazinylene group, a naphthyridinylene group, a quinoxalinylene group, a quinazolinylene group, a cinnolinylene group, a carbazolylene group, a phenanthridinylene group, an acridinylene group, a phenanthrolinylene group, a phenazinylene group, a benzoimidazolylene group, a benzofuranylene group, a benzothiophenylene group, an isobenzothiazolylene group, a benzoxazolylene group, an isobenzoxazolylene group, a triazolylene group, a tetrazolylene group, an oxadiazolylene group, a triazinylene group, a dibenzofuranylene group, a dibenzothiophenylene group, a benzocarbazolylene group, a dibenzocarbazolylene group, a thiadiazolylene group, an imidazopyridinylene group, and an imidazopyrimidinylene group; and a phenylene group, a pentalenylene group, an indenylene group, a naphthylene group, an azulenylene group, a heptalenylene group, an indacenylene group, an acenaphthylene group, a fluorenylene group, a spiro-fluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenalenylene group, a phenanthrenylene group, an anthracenylene group, a fluoranthenylene group, a triphenylenylene group, a pyrenylene group, a chrysenylene group, a naphthacenylene group, a picenylene group, a perylenylene group, a pentaphenylene group, a hexacenylene group, a pentacenylene group, a rubicenylene group, a coronenylene group, an ovalenylene group, a pyrrolylene group, a thiophenylene group, a furanylene group, an imidazolylene group, a pyrazolylene group, a thiazolylene group, an isothiazolylene group, an oxazolylene group, a isoxazolylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, an isoindolylene group, an indolylene group, an indazolylene group, a purinylene group, a quinolinylene group, an isoquinolinylene group, a benzoquinolinylene group, a phthalazinylene group, a naphthyridinylene group, a quinoxalinylene group, a quinazolinylene group, a cinnolinylene group, a carbazolylene group, a phenanthridinylene group, an acridinylene group, a phenanthrolinylene group, a phenazinylene group, a benzoimidazolylene group, a benzofuranylene group, a benzothiophenylene group, an isobenzothiazolylene group, a benzoxazolylene group, an isobenzoxazolylene group, a triazolylene group, a tetrazolylene group, an oxadiazolylene group, a triazinylene group, a dibenzofuranylene group, a dibenzothiophenylene group, a benzocarbazolylene group, a dibenzocarbazolylene group, a thiadiazolylene group, an imidazopyridinylene group, and an imidazopyrimidinylene group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₁₀ alkyl group, a C₁-C₂₀ alkoxy group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclopentenyl group, a cyclohexenyl group, a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a thiadiazolyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group.
 3. The condensed cyclic compound as claimed in claim 1, wherein L₁ in Formula 1 is a group represented by one of Formulae 3-1 to 3-32 below:

wherein, in Formulae 3-1 to 3-32, Y₁ is O, S, C(Z₃)(Z₄), N(Z₅), or Si(Z₆)(Z₇); Z₁ to Z₇ are each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spino-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; d1 is an integer selected from 1, 2, 3, and 4, d2 is an integer selected from 1, 2, and 3, d3 is an integer selected from 1, 2, 3, 4, 5, and 6, d4 is an integer selected from 1, 2, 3, 4, 5, 6, 7, and 8, d5 is 1 or 2, and d6 is an integer selected from 1, 2, 3, 4, and 5, and * and *′ represent binding sites to a neighboring atom.
 4. The condensed cyclic compound as claimed in claim 1, wherein L₁ in Formula 1 is a group represented by one of Formulae 4-1 to 4-32 below:

wherein, in Formulae 4-1 to 4-32, * and *′ represent a binding site to a neighboring atom, and CN is a cyano group.
 5. The condensed cyclic compound as claimed in claim 1, wherein a1 in Formula 1 is 0, 1, or
 2. 6. The condensed cyclic compound as claimed in claim 1, wherein A₁ in Formula 1 is selected from: a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, —P(═O)(R₂₁)(R₂₂), —P(═S)(R₂₃)(R₂₄), —S(═O)(R₂₅)(R₂₆), and —S(═O)₂(R₂₇); a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a thiadiazolyl group, an imidazopyridinyl group, an imidazopyrimidinyl group, and benzophenanthridinyl group; a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a thiadiazolyl group, an imidazopyridinyl group, an imidazopyrimidinyl group, and a benzophenanthridinyl group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclopentenyl group, a cyclohexenyl group, a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a Spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a thiadiazolyl group, an imidazopyridinyl group, an imidazopyrimidinyl group, and —Si(Q₃₁)(Q₃₂)(Q₃₃); and —Si(Q₁)(Q₂)(Q₃), wherein Q₁ to Q₃ and Q₃₁ to Q₃₃ are each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group.
 7. The condensed cyclic compound as claimed in claim 1, wherein A₁ in Formula 1 is selected from: a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, —P(═O)(R₂₁)(R₂₂), —P(═S)(R₂₃)(R₂₄), —S(═O)(R₂₅)(R₂₆), and —S(═O)₂(R₂₇); a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, and a benzophenanthridinyl group; a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a triazinyl group a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, and a benzophenanthridinyl group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group and —Si(Q₃₁)(Q₃₂)(Q₃₃); and —Si(Q₁)(Q₂)(Q₃), wherein Q₁ to Q₃ and Q₃₁ to Q₃₃ are each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group.
 8. The condensed cyclic compound as claimed in claim 1, wherein A₁ in Formula 1 is selected from: a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, —P(═O)(R₂₁)(R₂₂), —P(═S)(R₂₃)(R₂₄), —S(═O)(R₂₅)(R₂₆), and —S(═O)₂(R₂₇); and a group represented by one of Formulae 5-1 to 5-16 below:

wherein, in Formulae 5-1 to 5-16, Y₃₁ is O, S, C(Z₃₄)(Z₃₅), or N(Z₃₆); Z₃₁ to Z₃₆ are each independently selected from: a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, —P(═O)(R₂₁)(R₂₂), —P(S)(R₂₃)(R₂₄), —S(═O)(R₂₅)(R₂₆), —S(═O)₂(R₂₇), a C₁-C₂₀ alkyl group, and a C₁-C₂₀ alkoxy group; a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group; a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a triazinyl group a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group and a naphthyl group; and —Si(Q₃₁)(Q₃₂)(Q₃₃), wherein Q₃₁ to Q₃₃ are each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; e1 is an integer selected from 1, 2, 3, 4, and 5; e2 is an integer selected from 1, 2, 3, 4, 5, 6, and 7; e3 is an integer selected from 1, 2, and 3; e4 is an integer selected from 1, 2, 3, and 4; e5 is an integer selected from 1 and 2; and * represents a binding site to a neighboring atom.
 9. The condensed cyclic compound as claimed in claim 1, wherein A₁ in Formula 1 is selected from: a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, —P(═O)(R₂₁)(R₂₂), —P(═S)(R₂₃)(R₂₄), —S(═O)(R₂₅)(R₂₆), and —S(═O)₂(R₂₇); and a group represented by one of Formulae 6-1 to 6-65:

wherein, in Formulae 6-1 to 6-65, * represents a binding site to a neighboring atom, CN is a cyano group, and Ph is a phenyl group.
 10. The condensed cyclic compound as claimed in claim 1, wherein R₁ to R₁₁ in Formula 1 are each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, —P(═O)(R₃₁)(R₃₂), —P(═S)(R₃₃)(R₃₄), —S(═O)(R₃₅)(R₃₆), —S(═O)₂(R₃₇), a substituted or unsubstituted C₁-C₂₀ alkyl group, a substituted or unsubstituted C₁-C₂₀ alkoxy group, a substituted or unsubstituted C₆-C₂₀ aryl group, a substituted or unsubstituted C₁-C₂₀ heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, and —Si(Q₁₁)(Q₁₂)(Q₁₃).
 11. The condensed cyclic compound as claimed in claim 1, wherein R₁ to R₁₁ in Formula 1 are each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, —P(═O)(R₃₁)(R₃₂), —P(═S)(R₃₃)(R₃₄), —S(═O)(R₃₅)(R₃₆), —S(═O)₂(R₃₇), a substituted or unsubstituted C₁-C₂₀ alkyl group, and a substituted or unsubstituted C₁-C₂₀ alkoxy group.
 12. The condensed cyclic compound as claimed in claim 1, wherein R₂₁ to R₂₇ and R₃₁ to R₃₇ in Formula 1 are each independently selected from a substituted or unsubstituted C₆-C₂₀ aryl group, a substituted or unsubstituted C₁-C₂₀ heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group.
 13. The condensed cyclic compound as claimed in claim 1, wherein R₂₁ to R₂₇ and R₃₁ to R₃₇ in Formula 1 are each independently selected from: a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group; and a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a triazinyl group a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a triazinyl group a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, and —Si(Q₃₁)(Q₃₂)(Q₃₃).
 14. The condensed cyclic compound as claimed in claim 1, wherein R₂₁ to R₂₇ and R₃₁ to R₃₇ in Formula 1 are each independently selected from: a phenyl group, a naphthyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, and a triazinyl group; and a phenyl group, a naphthyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, and a triazinyl group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, and a naphthyl group.
 15. The condensed cyclic compound as claimed in claim 1, wherein the condensed cyclic compound represented by Formula 1 is represented by Formula 1A below:

wherein, in Formula 1A, L₁, a1, A₁, and b₁ in Formula 1A are defined the same as those in Formula
 1. 16. The condensed cyclic compound as claimed in claim 1, wherein the condensed cyclic compound is one of Compounds 1 to 100 below:


17. An organic light-emitting device, comprising: a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode and including an emission layer, wherein the organic layer includes the condensed cyclic compound as claimed in claim
 1. 18. The organic light-emitting device as claimed in claim 17, wherein the first electrode is an anode, the second electrode is a cathode, and the organic layer includes: i) a hole transport region between the first electrode and the emission layer, the hole transport region including at least one of a hole injection layer, a hole transport layer, a buffer layer, and an electron blocking layer, and ii) an electron transport region between the emission layer and the second electrode, the electron transport region including at least one selected from a hole blocking layer, an electron transport layer, and an electron injection layer.
 19. The organic light-emitting device as claimed in claim 18, wherein the electron transport region includes the condensed cyclic compound.
 20. The organic light-emitting device as claimed in claim 19, wherein the hole transport region includes at least one selected from a compound represented by Formula 201A below and a compound represented by Formula 202A below:

wherein, in Formulae 201A and 202A, L₂₀₁ to L₂₀₃ are each independently selected from: a phenylene group, a naphthylene group, a fluorenylene group, a spiro-fluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenanthrenylene group, an anthracenylene group, a pyrenylene group, a chrysenylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, a quinolinylene group, an isoquinolinylene group, a quinoxalinylene group, a quinazolinylene group, a carbazolylene group, and a triazinylene group; and a phenylene group, a naphthylene group, a fluorenylene group, a spiro-fluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenanthrenylene group, an anthracenylene group, a pyrenylene group, a chrysenylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, a quinolinylene group, an isoquinolinylene group, a quinoxalinylene group, a quinazolinylene group, a carbazolylene group, and a triazinylene group, each substituted with at least one selected from a deuterium, -F, -C1, -Br, -I, a hydroxyl group. a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl grou, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; xa1 to xa3 are each independently 0 or 1; R₂₀₃, R₂₁₁, and R₂₁₂ are each independently selected from: a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; and a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group, each substituted with at least one selected from a deuterium, -F, -C1, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; R₂₁₃ and R₂₁₄ are each independently selected from: a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group; a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group, each substituted with at least one selected from a deuterium, -F, -C1, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; and a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group. a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group, each substituted with at least one selected from a deuterium, -F, -C1, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; R₂₁₅ and R₂₁₆ are each independently selected from: a hydrogen, a deuterium, -F, -C1, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, and a C₁-C₂₀ alkoxy group; a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group, each substituted with at least one selected from a deuterium, -F, -C1, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, and a triazinyl group; and a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, and a triazinyl group, each substituted with at least one selected from a deuterium, -F, -C1, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; and xa5 is 1 or
 2. 